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Open Access Article
1 - Influence of argon gas flow on mechanical and electrical properties of sputtered titanium nitride thin films
Kaykhosrow Khojier Hadi Savaloni Ebrahim Shokrai Zohreh Dehghani Naser Zare Dehnavi -
Open Access Article
2 - *Investigation on the formation of titanium nitride thin films on 304 type stainless steel using plasma focus device
Narges Fani Hadi Savaloni -
Open Access Article
3 - Medical equipment bio-capability processes using the atmospheric plasma-sprayed titanium coating
F. Rezaei S. Saviz M. Ghoranneviss -
Open Access Article
4 - Synthesis of titanium-silver bimetallic nanoparticles by thermal plasma method
Sahar Sheini Shahrooz Saviz Amir Hossein Sari -
Open Access Article
5 - Calculation of energy lost by radiation and convection during laser welding of TA6V titanium alloy
Soumaya Lemkeddem Fethi Khelfaoui Oumelkheir Babahani -
Open Access Article
6 - Evaluation of anti-bacterial property of modified Nano silver packaging with Photocatalyst TiO2 in sheep’s head and trotters
Sharifan, A., Beheshti Zadeh, R., Ahari, H.*, Anvar, A. .Head and trotters sheep is traditional food in Iran. This product has very microbial load then for first time determine to done it. The current study was designed to evaluate application of silver nanoparticles, as an antimicrobial agent. Effect of Nano silver pack MoreHead and trotters sheep is traditional food in Iran. This product has very microbial load then for first time determine to done it. The current study was designed to evaluate application of silver nanoparticles, as an antimicrobial agent. Effect of Nano silver packaging in reduce microbial load in head and trotters compare with Control sample in the Refrigerator for 4°C for 1,2,3,4 days. Minced Head and trotters sheep (100g of product has 15 g fat, 90 ml⁄gr Cholesterol). this product has bought at Shahrvand mall. Nano - silver coating based on titanium dioxide was used to reduce the microbial load of the product. some Nano-coating of silver on titanium dioxide at a concentration of ppm 1000, 2000, 3000, 3500 and 4000 used at this study. For measurement nanoparticles size used Field Emission Scanning Electron Microscope (fesem) and to know Chemical bond used. The results showed The concentrations of silver nanoparticles ppm 4000 ppm 3500 on Escherichia coli maintaining the relative amounts of byproducts in four days of testing on impact (p<0.05). Average of nanoparticle was. Manuscript profile -
Open Access Article
7 - Evaluation of the performance of titanium dioxide nanocomposite scaffold compared to hydroxyapatite on the healing of rabbit femoral bone defects
حسین Sonbolekar علیرضا Jahandideh احمد Asghari سعید Hesaraki, ابوالفضل Akbarzadeh,This study was conducted with the aim of investigating the effectiveness of titanium dioxide nanocomposite scaffolds for the reconstruction of femur defects in rabbits. To investigate the effect of nanocomposites on the healing processes of broken bone (bone defect). 18 MoreThis study was conducted with the aim of investigating the effectiveness of titanium dioxide nanocomposite scaffolds for the reconstruction of femur defects in rabbits. To investigate the effect of nanocomposites on the healing processes of broken bone (bone defect). 18 New Zealand adult male white rabbits weighing 3 kg were studied. A cylindrical defect with a diameter of 6 x 5 mm was created in the femur of rabbits. The animals were divided into three experimental groups. The experimental groups after the defect were created included control, control (hydroxyapatite) and treatment (titanium dioxide). On the 15th and 45th days after surgery, the animals were killed and a sample was taken from the bone defect site and placed in 10% buffered formalin. 5 μm sections were evaluated after general and trichrome staining. Improvement of inflammation on day 15 and formation of new bone on day 45 in the nanocomposite group was the best in terms of ossification repair unit and reduction of inflammation. Nanocomposite had a significant recovery function in bone regeneration of defective areas. Manuscript profile -
Open Access Article
8 - The Effect of Titanium Dioxide on the Antibacterial and Mechanical Properties of Polystyrene Nanocomposites
Mohammad Yousefi Ali Akbar AzematiBackground and Objective: Due to the high use of polystyrene in food and medicine industries, it is particularly important to have antibacterial properties for these types of polymers. In this study, composite samples of polystyrene and titanium dioxide were p MoreBackground and Objective: Due to the high use of polystyrene in food and medicine industries, it is particularly important to have antibacterial properties for these types of polymers. In this study, composite samples of polystyrene and titanium dioxide were prepared by using a twin-screw extruder.Methods: The samples were prepared by injection moulding process for mechanical and anti-bacterial testing. It was observed that adding TiO2 would improve the mechanical and thermal properties of polystyrene.Finding: According to the results of the natural weathering test, TiO2 as a semi-conductor photo-catalyst has an active role in the determination of antibacterial properties of polymer matrix.Results and Discussion: Micro and nano-scale of TiO2 improved impact strength, tensile strength, Vicat softening temperature and melt flow index of all samples. Moreover, the prepared mixture showed appropriate antibacterial properties against E.Coli and S.Aureus. It was concluded that the antibacterial properties of the nanocomposite sample are better than those of the composite sample because of smaller size and larger surface area of Nano particles. Manuscript profile -
Open Access Article
9 - Photo Degradation and Removal of Malachite Green from Water, Using Nano Titanium Dioxide Photo Catalyst
Mahdi Banaee Amir Zeidi Maryam RezaeiBackground and Objective: Malachite greenis an extensively used biocide in the aquaculture industry, and is highly effective against important protozoal and fungal infections. It is also used as a food coloring agent, food additive, and medical disinfectant as well as a MoreBackground and Objective: Malachite greenis an extensively used biocide in the aquaculture industry, and is highly effective against important protozoal and fungal infections. It is also used as a food coloring agent, food additive, and medical disinfectant as well as a dye in the silk, wool, jute, leather, cotton, paper, and acrylic industries. Therefore, the elimination of malachite green in wastewater of aquaculture and textile, paper and acrylic industries is essential in order to prevent its adverse effects on aquatic organisms. In this study, degradation of malachite green with titanium dioxide nanoparticles (TiO2 NPs) under UV light was investigated. Method: For this reason, the effects of parameters such as different concentrations of malachite green (3.5, 7 and 14 mg L-1) and the Nano-catalyst concentrations (1.30, 2.60, and 5.20 mg) in constant temperature (25°C) and constant UV intensity (12 W, 230 V, 50 Hz) during 180 minutes were studied. Findings: The best degradation rate of malachite green was found in the concentration of 3.5 mg L-1 malachite green, pH: 9, and 2.60 mg of TiO2 NPs. Although with an increase in titanium dioxide nanoparticles the efficiency and removal rate of malachite green increased, the increase in the photo catalyst had no effects on increasing the efficiency of photo degradation. An increase in pH (9) may improve the removal rate of malachite green through increasing free radicals. An increase in the initial concentration of malachite green decreased the efficiency and removal rate of malachite green. Discussion and Conclusion: Therefore, the photo degradation of malachite green in the presence of TiO2 NPs photo catalyst could be a function of pH, the initial concentration of malachite green and concentration of TiO2 NPs. Manuscript profile -
Open Access Article
10 - Optimum Dioxide Titanium Nanoparticles in Dioxide Titanium /Bentonite Composite for Sonophotocatalytic decolorization of Methyl Orange dye
mahran yosofi Mohammad GhorbanpourBackground and Objectives: Dye is considered as one of the most important environmental pollutants in industrial wastewater due to its harmful effects on both human and environment. This MoreBackground and Objectives: Dye is considered as one of the most important environmental pollutants in industrial wastewater due to its harmful effects on both human and environment. This study was aimed to determine Optimum Dioxide Titanium Nanoparticles in Dioxide Titanium /Bentonite Composite for Sono-photocatalytic de-colorization of Methyl Orange dye. Methods: In this study, bentonite was used as the substrate to stabilize titanium dioxide photo-catalyst and the optimum amount of stabilized titanium dioxide nanoparticles in titanium dioxide/ bentonite composite which was evaluated for sono-photocatalytic removal of methyl orange dye. Accordingly, the optimal conditions for the photocatalytic process performance in dye removal included the effect of pH, methyl orange concentrations and nanocomposite doses. Findings: Structural properties of bentonite/titanium Dioxide composites and pure titanium dioxide nanoparticles were investigated using scanning electron microscope (SEM), Diffuse Reflectance Spectroscopy (DRS) and X-ray diffraction (XRD). Finally, the possibility of reuse of photo-catalyst was investigated in three periods. Based on SEM results, reducing the amount of titanium dioxide reduced the number of nanoparticles formed on the bentonite surface. XRD and DRS analyses showed successful composite formation. The optimum amount of titanium dioxide nanoparticles in titanium dioxide/bentonite composite was obtained for sono-photocatalytic dye removal of methyl orange with the titanium dioxide powder to bentonite ratio of 1: 2.5 in the primary mixture. Discussion and Conclusion: The study showed that increasing the amount of photo-catalyst in the reaction medium increased the speed and efficiency of the dye removal but its excessive increase had a negative effect on the reaction. The best conditions for dye degradation were obtained using titanium dioxide/bentonite nanocomposite at pH 4. According to the results, the increase in concentration increased dye removal time. Finally, the sono-photocatalytic composite efficiency was acceptable after three times of reuse. Manuscript profile -
Open Access Article
11 - Antimicrobial and Photocatalytic Properties of Bentonite/Titanium Dioxide Nanocomposites Doped with Silver
mahsa Madadi Mohammad GhorbanpourBackground and Objective: One of the main applications of titanium dioxide nanoparticles is killing the microorganisms spatially in drinking water and wastewater treatment. Method: Pure bentonite/Titanium Dioxide nanocomposites and doped with 3, 5 and 10% w/w sil MoreBackground and Objective: One of the main applications of titanium dioxide nanoparticles is killing the microorganisms spatially in drinking water and wastewater treatment. Method: Pure bentonite/Titanium Dioxide nanocomposites and doped with 3, 5 and 10% w/w silver were prepared by molten salt method. In this study, the antibacterial activity of silver doped titanium dioxide/bentonite nanocomposites was studied against two important microorganisms in food industry i.e. Escherichia coli and Staphylococcus aureusunder visible or UV radiation. The photocatalytic activity of these composites against methyl orange was also investigated. The prepared nanocomposites were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDX), UV-Vis diffusive reflectance spectrometer (UV-Vis DRS). Findings: The scanning electron microscope was showed, that agglomeration of spherical TiO2 nanoparticles formed on the bentonite surface. The XRD pattern revealed that all of the samples have only an anatase phase with crystalline size less than 50 nm. According to EDX analysis, the silver ions successfully doped to the TiO2 nanoparticles. According to UV-Vis DRS results, increasing amounts of doped Ag content in the silver-doped titanium dioxide results in a higher visible absorbance capability of the materials. Parent bentonite did not show antibacterial activity. Titanium dioxide/bentonite nanocomposites showed very weak antibacterial activity. The results showed that the antibacterial ability was significantly improved by doping silver content comparing with pure TiO2/bentonite nanocomposites. This study also showed that Gram-positive bacteria (S. aureus) were more readily disinfected by the photo catalysts than a Gram-negative bacterium (E. coli). According to photocatalytic activity findings, doping of nanocomposites with 5 % silver ions showed maximum photocatalytic activity. This is attributed to the increasing visible absorption capacity due to the presence of silver ions. Discussion and Conclusion: Antibacterial and photocatalytic activity of titanium dioxide/bentonite nanocomposites increases dramatically due to the addition of silver ions. This can be attributed to the release of silver ions from nanocomposites and the increase in the production of free radicals as a result of increased photocatalytic activity due to reducing the energy gap of titanium dioxide nanoparticles in nanocomposites. Manuscript profile -
Open Access Article
12 - Investigation of photocatalytic removal of methyl orange by titanium dioxide nanoparticles modified with silver and cobalt
Nasim Ziaeifar saber KhodaeiBackground and Objective: In order to investigate the photocatalytic activity of modified titanium dioxide nanoparticles in order to remove methyl orange contaminants, parameters such as the amount of contaminant concentration, the amount of photocatalytic, the pH of th MoreBackground and Objective: In order to investigate the photocatalytic activity of modified titanium dioxide nanoparticles in order to remove methyl orange contaminants, parameters such as the amount of contaminant concentration, the amount of photocatalytic, the pH of the solution and the calcination temperature were investigated. Material and Methodology: In this study, Ag-Co / TiO2 nanoparticles were synthesized by sol-gel method and characterized by TEM, SEM, XRD and EDX techniques. The results of XRD diffraction studies showed that the simultaneous deposition of silver and cobalt had no effect on the crystalline pattern of titanium dioxide. The formation of Ag-Co / TiO2 nanoparticles and their approximate size were confirmed using the XRD spectrum and is about 270 nm. TEM images with a particle size of about 300 nm also confirm the XRD results. The morphology and purity of these synthesized nanoparticles were evaluated through SEM and EDX images. The results of EDX analysis showed that Ag-Co / TiO2 nanoparticles prepared by sol-gel method did not have a peak of impurity in the sample. The photocatalytic activity of Ag-Co / TiO2 nanoparticles under visible light irradiation was evaluated in the removal of methyl orange contaminants. Findings: Co doped TiO2 nanoparticles by Ag and Co were shown to have highest activity as compared with the Ag/TiO2 , Co /TiO2 and pure TiO2 nanoparticles. The highest percentage of methyl orange removal by Ag-Co / TiO2 is 99.5% in 75 minutes. Discussion and Conclusion: The optimum contents of silver and Cobalt for the preparation of co-doped Ag,Co/TiO2 nanoparticles were 0.9 and 0.3 at mol%, respectively Manuscript profile -
Open Access Article
13 - Optimum Dioxide Titanium Nanoparticles in Dioxide Titanium /Bentonite Composite for Sono Photo Catalytic De-Colorization of Methyl Orange dye
Mehran yousefi mohammad ghorbanpourBackground and Objectives: Dye is considered as one of the most important environmental pollutants in industrial wastewater due to its harmful effects on both human and environment. This study was aimed to determine Optimum Dioxide Titanium Nanoparticles in Dioxide Tita MoreBackground and Objectives: Dye is considered as one of the most important environmental pollutants in industrial wastewater due to its harmful effects on both human and environment. This study was aimed to determine Optimum Dioxide Titanium Nanoparticles in Dioxide Titanium /Bentonite Composite for sono photo catalytic de-colorization of Methyl Orange dye. Methods: In this study, bentonite was used as the substrate to stabilize titanium dioxide photo catalyst and the optimum amount of stabilized titanium dioxide nanoparticles in titanium dioxide/ bentonite composite was evaluated for sono photo catalytic removal of methyl orange dye. Accordingly, the optimal conditions for the photo catalytic process performance in dye removal included the effect of pH, methyl orange concentrations and nanocomposite doses. Findings: Structural properties of bentonite/titanium dioxide composites and pure titanium dioxide nanoparticles were investigated using scanning electron microscope (SEM), Diffuse Reflectance Spectroscopy (DRS) and Xray diffraction (XRD). Finally, the possibility of reuse of photo catalyst was investigated in three periods. Based on SEM results, reducing the amount of titanium dioxide reduced the number of nanoparticles formed on the bentonite surface. XRD and DRS analyses showed successful composite formation. The optimum amount of titanium dioxide nanoparticles in titanium dioxide/bentonite composite was obtained for sono photo catalytic dye removal of methyl orange with the titanium dioxide powder to bentonite ratio of 1: 2.5 in the primary mixture. Discussion and Conclusion: The study showed that increasing the amount of photo catalyst in the reaction medium increased the speed and efficiency of the dye removal but its excessive increase had a negative effect on the reaction. The best conditions for dye degradation were obtained using titanium dioxide/bentonite nanocomposite at pH 4. According to the results, the increase in concentration increased dye removal time. Finally, the sono photo catalytic composite efficiency was acceptable after three times of reuse. Manuscript profile -
Open Access Article
14 - The Influence of Oxidized Interlayer on the Adhesion of Bioactive Cao-P2o5-Tio2-Na2o Glass Ceramic Coating to the Titanium Substrate
Sh. Honarvar B. Eftekhari Yekta -
Open Access Article
15 - Investigation of the In Situ Ceramic Particles (TiCN, TiC) Composite Cladding on the Abrasive Wear Resistance of the Steel Substrate
M. Mohammadikhah A. Hadizadeh S. Mehrabeian -
Open Access Article
16 - Effect of Applied Voltage on the Formation of TiO2 Nanotube on Titanium Substrate using Anodizing Process
M Ghanbari Haghighi P Parsi Z. S Seyedraoufi -
Open Access Article
17 - Improving the Tribological Behavior of Commercially Pure Titanium Using TIG Surface Alloying
A. Vahedi Nemani M. Ghaffari N. Rasekh Saleh H. Tazikeh -
Open Access Article
18 - A Review on Biocompatibility Characteristics of Dental Implant’s Titanium Surface Treatment Methods, Focusing on SLA and SLActive Procedures
Mohammadi B Anbarzadeh E -
Open Access Article
19 - Theoretical study of the doping effects of iron and titanium atoms on the adsorption behavior of carbon nanosheet
Sara Ahmadi Hossein Raanaei Saeed ZareiIn this research, the electronic structure and distribution of graphene nanosheets after replacing iron and titanium atoms with a carbon atom in graphene nanosheet has been investigated using density functional theory. After optimization at the level of B3LYP/lanl2dz th MoreIn this research, the electronic structure and distribution of graphene nanosheets after replacing iron and titanium atoms with a carbon atom in graphene nanosheet has been investigated using density functional theory. After optimization at the level of B3LYP/lanl2dz theory, it was found that the replacement of iron and titanium atoms reduces the bandgap in graphene nanosheets. This reduction is greater for iron atoms than titanium. On the other hand, the calculated thermodynamic properties for these systems (negative enthalpy values) indicate that the reaction is exothermic. In addition, graphene nanosheets with a doped iron atom with a hardness of 0.0055 has the lowest hardness and therefore the highest reactivity compared to nanosheet with doped titanium atom with a chemical hardness of 0.0620. Manuscript profile -
Open Access Article
20 - Preform and Process Design of Ti-6Al-4V Compressor Blade using Equipotential Lines and 3D FE Simulation
M. Soleimanzadeh M.M. Fallah -
Open Access Article
21 - Effect of Welding Parameters on Microstructure and Mechanical Properties of Friction Stir Spot Welded of Titanium Alloy TiAl6V4
Saeid Nader Masoud Kasiri- Asgarani kamran amini Morteza Shamanian -
Open Access Article
22 - Multi-Objective Optimization of the Stamping of Titanium Bipolar Plates for Fuel Cell
Vahid Modanloo Vali Alimirzaloo Majid Elyasi -
Open Access Article
23 - Strength Improvement of Nano-Structured Titanium Processed by Parallel Tubular Channel Angular Pressing
Ali Amani Hamid Soleimanimehr Shahram Etemadi Haghighi Farid Biniyazan -
Open Access Article
24 - The Effect of Ethanol Extraction of Aloe vera on Certain Biomarkers of Cardiovascular Disease in Mice Treated with Nanoparticles of Titanium Dioxide
Fereshteh Javan Masoomi Jila Talat Mehrabad Roghayeh Babri BonabInroduction & Objective: The effect of ethanol extraction of Aloe vera on certain biomarkers of cardiovascular disease in mice treated with titanium dioxide nanoparticles was studied.Material and Methods: Mice were received titanium dioxide nanoparticles with density of MoreInroduction & Objective: The effect of ethanol extraction of Aloe vera on certain biomarkers of cardiovascular disease in mice treated with titanium dioxide nanoparticles was studied.Material and Methods: Mice were received titanium dioxide nanoparticles with density of 100 milligrams per kg and ethanol extraction of aloe vera plant with density of 100, 200 and 300 milligrams per kg for 30 days. Plasma levels ofmalondialdehyde, rich sialic acid, troponin I and creatine kinase MB at the end of treatment was evaluated. The antioxidant activity of ethanol extraction in Aloe Vera using free radical DPPH and total phenol levels were considered.Results: The results showed that giving titanium dioxide nanoparticles through the stimulation of oxidative activity had a significant increase in plasma levels of malondialdehyde (MDA). Plasma levels of troponin I, creatine kinase MB and rich sialic acid also significantly increased. With increasing density of aloe vera, the total phenol and antioxidant activity of ethanol extraction increased. Giving the extraction significantly reduced the plasma levels of biomarkers of cardiovascular damage in mice treated with titanium dioxide nanoparticles.Conclusion:According to the results, ethanol extraction of aloe vera as an antioxidant compound is able to reduce the levels of cardiovascular damage in mice treated with titanium dioxide nanoparticles. Manuscript profile -
Open Access Article
25 - ANSYS Modeling for Bone Reconstruction by Using Hybrid Nano Bio Composite
J Sattar Kashan S Mahmood Ali -
Open Access Article
26 - Toxicity and insecticidal effect of titanium oxide nanoparticles on American cockroach
Ali Noori Shahzad ShiraniBackground and purpose: American cockroach is one of the important household insects, which transmits many types of pathogens to the environment. On the other hand, the methods used to control it today are somewhat ineffective and have caused resistance in these insects MoreBackground and purpose: American cockroach is one of the important household insects, which transmits many types of pathogens to the environment. On the other hand, the methods used to control it today are somewhat ineffective and have caused resistance in these insects. Materials and methods: 311 adult American cockroaches were purchased from Tehran Health College. Titanium oxide nanoparticles were also purchased from Neutrino company, Tehran. Different concentrations of nanoparticles were prepared for oral and contact treatments of American cockroaches. American cockroaches were treated by contact and oral method with different concentrations of titanium oxide nanoparticles with three repetitions. The average percentage of insect mortality in different groups was compared by one-way analysis of variance and Duncan's test. Also, the average percentage of insect mortality on different days in each group was compared by analysis of variance with repeated observations. Results: The oral treatment of American cockroaches was more effective than the contact treatment in concentrations of 15 and 21% in all days, but the contact treatment was more effective than the oral treatment in all days except the seventh day in a concentration of 25%. In general, oral treatment was more effective than contact treatment. With increasing dose and passage of time, the mortality percentage of American cockroaches increased significantly due to contact and oral treatment with titanium dioxide nanoparticles. Conclusion: The use of different nanoparticles, including titanium dioxide nanoparticles, can create a significant effect in controlling the American cockroach as a new method along with the previous methods. Manuscript profile -
Open Access Article
27 - A review of the electronic and structural properties of titanium dioxide photocatalysts for the removal of environmental pollutants from wastewater
Abdulhamid Dehghani Azam Moazeni Bistgani Milad Ghezelsofloo Soheil Dehghani Siyahaki Hamidreza MoradiToday, the treatment of environmental pollutants (textile dyes and wastewater from pharmaceutical wastes) has become one of the most challenging issues, and several methods have been used to treat wastewater, including chemical, physical, and biological methods, each of MoreToday, the treatment of environmental pollutants (textile dyes and wastewater from pharmaceutical wastes) has become one of the most challenging issues, and several methods have been used to treat wastewater, including chemical, physical, and biological methods, each of these methods has its own advantages and disadvantages. In recent decades, titanium dioxide has created suitable conditions for environmental applications due to its unique chemical and physical properties. The basis of photocatalysis processes is based on the production of highly active species such as hydroxyl radicals, which quickly oxidize a wide range of organic pollutants. Titanium dioxide as a semiconductor is an efficient photocatalyst which has been used for oxidation of organic compounds, detoxification, regeneration of toxic metals, effective removal of heavy metals, destruction of bacteria and viruses. Since titanium dioxide and many other semiconductors have a large band gap, the use of photocatalytic water treatment using titanium dioxide is limited due to its relatively low efficiency. In order to improve the photocatalytic efficiency of titanium dioxide for water purification, as well as other photocatalytic applications, a lot of research has been done to extend the photocatalytic response of titanium dioxide to the visible range. In this article, titanium dioxide is systematically introduced and its electronic and structural properties are investigated. Manuscript profile -
Open Access Article
28 - Study of structural and optical properties of anthocyanin- modified TiO2 for the purpose of photodegradation
Marzieh Ataie Dila Azadeh Haghighat zadeh -
Open Access Article
29 - Synthesis of Nano-Sized Titania Particles by Hydrolysis of Titanium Tetrachloride
M. Farahmandjou M. Ramazani -
Open Access Article
30 - Simulation of a sheet hydroforming process for Titanium cup shape products and validation
فریبرز فروهندهSheet hydroforming process has been come very common between sheet metal forming methods due to some advantages like better surface quality of products, more drawing ratio, less needing to secondary operation etc. Titanium and Titanium alloys are very applicable not onl MoreSheet hydroforming process has been come very common between sheet metal forming methods due to some advantages like better surface quality of products, more drawing ratio, less needing to secondary operation etc. Titanium and Titanium alloys are very applicable not only due to high ratio of strength to weight but also because of ability to tolerate work in elevated temperature. In this paper, sheet hydroforming process has been simulated using finite element method. Different parameters like effect of blank holding force, strain rate or ram speed, temperature, fluid pressue, thickness distribution etc have been analyzed. A sheet hydroforming setup based on simulation studies has been designed and fabricated. Setup has been tested for different metals and alloys especially for Titanium. Setup has ability to measure ram speed, blank holding force, total forming load and all the parameters. A good agreement has been found by comparison between simulation and experimental results. Finally, material characterization for sheet hydroformed products has been presented. Manuscript profile -
Open Access Article
31 - Investigation of scattering caused by electric field in TiO2 nanocrystals
majid shabzendehA combination of external Electric Field and Raman backscattering, as a new method called Electric Field Induced Raman scattering, has been used to study TiO2 Nanocrystallites. This method can be widely used to obtain phononic properties of materials. In this article, w MoreA combination of external Electric Field and Raman backscattering, as a new method called Electric Field Induced Raman scattering, has been used to study TiO2 Nanocrystallites. This method can be widely used to obtain phononic properties of materials. In this article, we report the fabrication of TiO2 Nanoparticles and their restriction in our lab by a simple modified sol-gel process. Moreover, the TiO2 Nanocrystallites synthesized were characterized by X-ray Diffraction and back scattering Raman techniques. Furthermore, the effects of an external direct current electric field on the lattice internal and external modes of the Nanocrystallites were investigated by the recorded in situ Raman data. Our results show that the applied external electric field can make a strong interaction and widening of the Raman active modes, the intensity amplifying and possible peak shifts in the Raman spectra can be observed.In this article, an attempt is made to investigate the effect of electric field on nanoparticles. Manuscript profile -
Open Access Article
32 - Multi-objective Optimization of Turning of Titanium Alloy Under Minimum Quantity Lubrication
Satish Chinchanikar Jitendra Katiyar Omkar Manav -
Open Access Article
33 - Response of Some Morpho-physiological Characteristics of Borago (Borago officinalis) to Nano Particles of Titanium Spraying
Roufiya Heydary Romy Payam Moaveny Hossein Hoseinpour Darvishy Mahdi ArefradBrago is an important medicinal plant. This study, thus, was conducted with different levels of nano particles of titanium (0.01, 0.03 and 0.05%) and elemental titanium on its different growth stages (4-5 leaf, flowering and after flowering) with four replications in a MoreBrago is an important medicinal plant. This study, thus, was conducted with different levels of nano particles of titanium (0.01, 0.03 and 0.05%) and elemental titanium on its different growth stages (4-5 leaf, flowering and after flowering) with four replications in a factorial experiment based on randomized complete block design at the Agricultural Field of Rement Village of Babol, Mazandaran, Iran, in 2012. Results showed that there were a significant differences between treatments of titanium, time of treatments and between their interactions. Among the traits under study, leaf fresh weight, leaf dry weight, stem fresh weigh at 1% and plant hight, stem dry weight, total plant fresh weight and total plant dry weight at %5 levels of probabilities showed significant differences for their interaction between different treatments of titanium and different stage of development. The highest plant height, leaf dry weight and plant fresh weight and plant dry weight were produced when nano particles of titanium applied after flowering stage. Where as, the highest fresh leaf, fresh stem weight and total plant fresh weights were obtained when plants treated with titanium at flowering stage. On the other hand, dry weight of flowering branches showed significant negative correlation with GPX antioxidant enzyme. The lowest GPX antioxidant enzyme was produced when nano particles of titanium were applied after flowering stage at 0.01% probability level. As a whole, the results of this experiment suggest that there are significant differences among titanium treatments when they are applied at different growth stages of this plant. This study also showed that application of nano particles of titanium after flowering of this plant increased its flowering branches. Manuscript profile -
Open Access Article
34 - Histopathological study of gill in common carp (Cyprinus carpio) and goldfish (Carassius auratus) during exposure to lethal concentrations of nano-zinc oxide, nano copper oxide and nano titanium dioxide
Aliakbar Hedayati Fatemeh Darabitabar hassan rezaeiApart from skin, gills are the first place of direct exposure of fish to toxins or pollutants therefore study of changes in gill structure is a suitable indicator of toxins or pollutants under stressful conditions. The aim of this study was to investigate pathological a MoreApart from skin, gills are the first place of direct exposure of fish to toxins or pollutants therefore study of changes in gill structure is a suitable indicator of toxins or pollutants under stressful conditions. The aim of this study was to investigate pathological alterations of gill tissue in common carp during exposure to different nanoparticles. For this study, 210 fry common carp with a total length of 7.36±0.30 cm and goldfish with a total length of 6.50±0.43 cm in 6 treatments with 3 replicates in each treatment were placed in 60 liter aquariums in groups of 11 individuals. Gill tissue samples of common carp and goldfish were taken 7 days after exposure to 50% lethal concentration of nano-zinc oxide, nano copper oxide and titanium dioxide nanoparticles. Histological changes were evident in samples exposed to nano-zinc oxide, nano copper oxide and titanium dioxide nanoparticles while no detectable changes were observed in control gill. The symptoms observed in both fish consisted of gill hyperplasia, adhesion of secondary lamellae, increased levels of mucus and hyperemia. The most common complication observed was gill hyperplasia and an increase in the amount of mucus. The results of this study indicate that 50% lethal concentration of nanoparticles of titanium, copper and zinc can cause tissue damage and destruction. Also, sub-lethal toxicity of nano-zinc oxide is higher than nano copper oxide and nano titanium dioxide and causes much wider effects on gill tissue of common carp and goldfish. Manuscript profile -
Open Access Article
35 - Electrophoretic deposition technique for coating nano TiO2 on SS316L alloy.
Hussein Sabea Amnas Murtdha Siyah Rostam Moradian Iraj Monochehri -
Open Access Article
36 - Isothermal and cyclic oxidation behavior of AISI 430 ferritic stainless steel coated with titanium
Saeed Keshavarz Morteza Zandrahimi Hadi Ebrahimifar -
Open Access Article
37 - CORROSION BEHAVIOR OF BIOACTIVATED TITANIUM DENTAL IMPLANT USING DIFFERENT CHEMICAL METHODS
Mohammad Khodaei Ehsan Khoda Bande Dastjerdi Hamid Nazemi Alireza Valanezhad Ikuya Watanabe -
Open Access Article
38 - Hydrothermal Assisted Sol-Gel Process on Binary Mixtures of Aluminum and Titanium Alkoxides: A Novel Route for the Fabrication of Single Phase Tialite
Mahdi Mirzaee Mostafa Amini Masoomeh Sharbatdaran -
Open Access Article
39 - Mechanically Activated Combustion Synthesis of B4C-TiB2 Nanocomposite Powder
Maryam shojaie bahaabad -
Open Access Article
40 - The Effect of Annealing Temperature on the High Temperature Deformation Behavior of Ti-5Al-4.2V-0.8 Mo-2Fe α/β Titanium Alloy
Maryam Morakabati Peyman Ahmadian Parnia Parvizian -
Open Access Article
41 - Fine Grain Formation in as Cold Worked SP700 Titanium Alloy and Its Effect on Mechanical and Superplastic Properties
Marjan Daryaban Maryam Morakabati Noshin MerajiThe aim of this research is to study the effect of fine grain structure on the mechanical and superplastic properties of cold worked SP700 alloy. Thickness reductions of 20%, 40%, and 60%. were applied during cold rolling. Then the specimens were annealed at 700°C, 750° MoreThe aim of this research is to study the effect of fine grain structure on the mechanical and superplastic properties of cold worked SP700 alloy. Thickness reductions of 20%, 40%, and 60%. were applied during cold rolling. Then the specimens were annealed at 700°C, 750°C, and 800°C for 40 minutes. The tensile test was applied at 25, 700oC, 750°C, and 800°C with strain rates of 0.01s-1, 0.005s-1 and 0.001s-1. The SEM and OM were used to analyze the specimens' microstructures. The alloy cold rolled to 40% reduction and annealed at 700°C exhibited a maximum elongation of 1380% at a stress level of 30 MPa and a strain rate of 0.005 s-1 at 700°C. Microstructural evlauation showed that during the superplastic test, dynamic recrystallization took place. The strain rate sensitivity varied in the range of 0.32 to 0.46. Fundamental equations were also used to determine the mechanism of superplasticity. The activation energy is obtained as 385 kJ.mol-1. Results validated that the Rachinger sliding is the main superplastic mechanism in the SP700 alloy. Manuscript profile -
Open Access Article
42 - Production of Fe-TiN and Fe-Ti(N,C) composite powders by mechanical alloying
S Nazari A Saidi A Shafyei -
Open Access Article
43 - Fabrication of TiC particulate reinforced Ni-50Fe super alloy matrix composite powder by mechanical alloying
M.H Shirani A Saidi A.R Shirani -
Open Access Article
44 - Effects of jasmonic acid and titanium dioxide nanoparticles on process of changes of phytochemical and antioxidant in genotypes of Satureja hortensis L.
Azar Davari Mamoud Solouki Bahman Fazeli-NasabIn this research to evaluate the effect of sprying of titanium dioxide nanoparticles (0, 30, 60 and 90 mg/l) and jasmonic acid (0, 50, 100 and 150 mM) on enzymatic and non-enzymatic antioxidants As well as physiological traits 5 genotype of Satureja hortensis L. factori MoreIn this research to evaluate the effect of sprying of titanium dioxide nanoparticles (0, 30, 60 and 90 mg/l) and jasmonic acid (0, 50, 100 and 150 mM) on enzymatic and non-enzymatic antioxidants As well as physiological traits 5 genotype of Satureja hortensis L. factorial experiment in a completely randomized design with three replications. Treatments were conducted at four leaf stage on the aerial parts of the plants and then were harvested 48 hours after spraying. At first were extracted from shoots and then all traits; enzymatic and non-enzymatic antioxidants and physiological traits were measured by using a spectrophotometer. Analysis of variance showed that the interaction of spraying different concentrations of titanium dioxide nanoparticles and jasmonic acid, catalase, peroxidase, polyphenol oxidase, ascorbate peroxidase, total protein, flavonoids, anthocyanins and total phenolics were significant at the 1% level. The highest catalase (0.0536 mg per gram of fresh weight) at doses of 30 mg per liter in Tabriz plant genotype nanoparticles of titanium dioxide and 150 mMjasmonic acid per liter;Most of ascorbate peroxidase (0.0514 mg per gram of fresh weight) in plant genotypes in concentrations of 60 mg per liter Ardestān nanoparticles of titanium dioxide and 50 mMjasmonic acid;Most peroxidase activity (0.000494 mg per gram of fresh weight) at a concentration of 60 mg per liter in genotype Savory Ardestān nanoparticles of titanium dioxide and 150 mMjasmonic acid; The highest polyphenol oxidase (0.0628 mg per gram of fresh weight) in Tabriz genotypes in treatments of 30 mg of nanoparticles of titanium dioxide and zero (control) M jasmonic acid was obtained.Savory population most effective physiological traits, Savory Rey, the antioxidant enzyme, Savory Ardestan and Tabriz and the non-enzymatic antioxidants (anthocyanins, phenols and flavonoids) Savory Mashhad. The results of this study showed that nano-titanium and jasmonic caused time and non-enzymatic antioxidant and physiological Savory is the most effective hormone levels nanoparticles of titanium, 30 ppm and jasmonic acid was 50 micro molar. Manuscript profile -
Open Access Article
45 - Investiganting the effect of methyl jasmonate and titanium dioxide nanoparticles on physiological and phytochemical variations of Rosa damascena. Mill. esential oil
Zahra Allahverdi Mehrab Yadegari Mohammad MoghaddamRosa damascena Mill. belongs to Rosaceae family and is considered as one of the most important medicinal and industrial plant. In the present study, the effects of foliar application of methyl jasmonate and titanium dioxide nanoparticles were investigated on physiologic MoreRosa damascena Mill. belongs to Rosaceae family and is considered as one of the most important medicinal and industrial plant. In the present study, the effects of foliar application of methyl jasmonate and titanium dioxide nanoparticles were investigated on physiological and phytochemical traits of Rosa damascena Mill. in two separate experiments based on a randomized complete block design with 3 replications in Farsan during two growing seasons (2019 and 2020). Foliar application of methyl jasmonate (0, 0.5, 1, and 2 mM) and titanium dioxide nanoparticles (0, 100, 200, and 300 mg L-1) was performed three times with 4-day intervals before the flowering stage. Essential oil extraction was done by steam distillation (a clevenger apparatus), phytochemical evaluation was performed using spectrophotometric method, and antioxidant performance was evaluated through DPPH test. Results showed that foliar application of elicitors increased dry weight of leaves and photosynthetic pigments. The phenolic compounds of leaves and petals of R. damascena Mill. also increased in response to applied elicitors and the highest increment was observed in plants treated with 1 mM methyl jasmonate and 100 mg L-1 titanium dioxide nanoparticles. Also the results showed the positive effect of applied treatments on increasing macro (N, P, K and Mg) and micro elements (Fe, Mn, and Zn) in leaves of damask rose. Methyl jasmonate (0.5-1 mM) increased the essential oil content of the treated plants by 34.32%. According to the obtained results, methyl jasmonate applied at concentration of 1 mM is suggested to improve the physiological and phytochemical characteristics of the R. damascena plants. Manuscript profile -
Open Access Article
46 - Prefabricated Concrete Elements for the facade Industry with Nano cement composites containing silica fume, nano-silica and TiO2
Raheleh Rostami Sayedeh Fatemeh Khoshkalam Soleimandarabi Mehdi Nezhadnaderi -
Open Access Article
47 - Synergistic effects of Titanium dioxide nanoparticles and Paclitaxel combination on the DNA structure and their antiproliferative role on MDA-MB-231cells
Azadeh Hekmat Masoumeh Afrough Saeed Hesami Tackallou Faizan Ahmad -
Open Access Article
48 - Evaluation of heat temperatures on the structure of nano-rod
hassan GHEISARI -
Open Access Article
49 - A polycaprolactone bio-nanocomposite bone substitute fabricated for femoral fracture approaches: Molecular dynamic and micro-mechanical Investigation
Ashkan Farazin Hossein Akbari Aghdam Mehdi Motififard Farshid Aghdavoudi Alireza Kordjamshidi Saeed Saber-Samandari Saeid Esmaeili Amirsalar KhandanThe application of porous bio-nanocomposites polymer has greatly increased in the treatment of bone abnormalities and bone fracture. Therefore, predicting the mechanical properties of these bio-nanocomposites is very important prior to their fabrication. Investigation o MoreThe application of porous bio-nanocomposites polymer has greatly increased in the treatment of bone abnormalities and bone fracture. Therefore, predicting the mechanical properties of these bio-nanocomposites is very important prior to their fabrication. Investigation of mechanical properties like (elastic modulus and hardness) is very costly and time-consuming in experimental tests. Therefore, researchers have focused on mathematical methods and new theories to predict the artificial synthetic bone for orthopedic application. In this paper, porous bio-nanocomposites synthetic bone including nanocrystalline Hydroxyapatite (HA) nanoparticles and Titanium oxide (TiO2) containing (0 wt%, 5 wt%, 10 wt%, and 15 wt% of TiO2) as reinforcements and the biocompatible polycaprolactone (PCL) polymer as the matrix has been used for the fabrication of PCL-HA-TiO2. Then, the mechanical test was conducted on the samples and the extracted value from the experimental test was compared with the analytical model using molecular dynamics (MD) method. Finally, these properties were compared with the Dewey micromechanics theory, and the error rate between the experimental method and the Dewey theory was reported. It was found that as the porosity percentage increased in the sample three-phase in composites, the model has a higher error in this theory. Then, due to the importance of hydroxyapatite in the fabrication of bone scaffolds, the obtained results of mechanical properties (Elastic modulus and Poisson’s ratio) have been analyzed statistically. The application of these equations in the rapid prediction of Elastic Modulus and Poisson's ratio of the synthetic bone scaffolds made of hydroxyapatite is highly recommended. Manuscript profile -
Open Access Article
50 - Prefabricated Concrete Elements for the facade Industry with Nano cement composites containing silica fume, nano-silica, and TiO2
Sayedeh Fatemeh Khoshkalam Soleimandarabi Raheleh Rostami Mehdi Nezhadnaderi -
Open Access Article
51 - Determination of Acetaminophen Via TiO2/MWCNT Modified Electrode
Ali Asghar Pasban Elham Hossein Nia Masoumeh Piryaei -
Open Access Article
52 - Synergistic effects of Titanium dioxide nanoparticles and Paclitaxel combination on the DNA structure and their antiproliferative role on MDA-MB-231cells
Azadeh Hekmat Masoumeh Afrough Saeed Hesami Tackallou Faizan Ahmad -
Open Access Article
53 - A polycaprolactone bio-nanocomposite bone substitute fabricated for femoral fracture approaches: Molecular dynamic and micromechanical Investigation
Ashkan Farazin Hossein Akbari Aghdam Mehdi Motififard Farshid Aghadavoudi Alireza Kordjamshidi Saeed Saber-Samandari Saeid Esmaeili Amirsalar Khandan -
Open Access Article
54 - Evaluation of heat temperatures on the structure of nano-rod
Hassan GHEISARI -
Open Access Article
55 - Experimental Study of the Effect of Rotational Speed, Feed Rate, Lubricant and Tool Material in Friction Drilling of the Titanium Sheets
Mehran Yazdani Nogarani Reza Nosouhi -
Open Access Article
56 - Survey and Study of Machinability for Titanium Alloy Ti-6Al-4V through Chip Formation in Milling Process
Hassan Gheisari Ebrahim Karamian -
Open Access Article
57 - Machinability evaluation of Titanium alloy in Laser Assisted Turning
Kamran Puladsaz Razavi Shojae Rezavi Mehdi Tajaddara -
Open Access Article
58 - Investigating the Effect of Titanium Addition on the Microstructure and Mechanical Properties of Ni-Hard 4 Cast Iron
Masoud Bahrami Alamdarlo Kamran Amini Vahid Nemati Najafabadi Mahyar Mohammadnezhad -
Open Access Article
59 - Investigation of Mechanical Properties for Commercial Purity Titanium Severely Plastic Deformed by Accumulative Roll-bonding Process
Pooya Bahrami Abdolhamid Azizi -
Open Access Article
60 - Simulation of Tool Rotation and Travelling Speed Effects on Friction Stir Welding of Ti-6Al-4V
Hamed Aghajani Derazkola -
Open Access Article
61 - Production of Dispersed Ceramic Nano-Particles in Al Alloy Using Friction Stir Processing
Amin Rabiezadeh Ahmad Afsari -
Open Access Article
62 - Nano TiO2–H3BO3 as an efficient and recycable catalyst for the synthesis of 5-substituted-1H-tetrazoles
Fatemeh Abrishami Maryam Ebrahimikia Fatemeh Rafiee -
Open Access Article
63 - Novel and cost-effective biocatalyst consisting of nanofibrillated cellulose and TiCl3 for the synthesis of 2,3'-dihydroquinazolin-4-(1H)-ones
Hannaneh Heidari Kobra Nikoofar Yeganeh Shahedi -
Open Access Article
64 - Synthesis of Fe-doped TiO2 with improved photocatalytic properties under Vis-L irradiation
Imane Ellouzi Boutaina Regraguy Souad El hajjaji Mourad Harir Philippe Schmitt-Kopplin Hinda Lachheb Larbi Laânab -
Open Access Article
65 - Rapid Synthesis of Silver Nanoparticles and Their Decoration on TiO2 by Plasma-Over-Liquid Process: Characterization and Application for Tetracycline Antibiotic Degradation
Margarita Skiba Victoria Vorobyova -
Open Access Article
66 - The effects of nano TiO2 and Nano aluminium on the growth and some physiological parameters of the wheat (Triticum aestivum) .
Tooba Aliabadi Akbar Safipour Afshar Fatemeh Saeid Nematpour -
Open Access Article
67 - Investigating the effect of pretreatment of chickpea Adl cultivar (Cicer arietinum L) with Nano Titanium dioxide on germination and seedling characteristics.
zahra fasahat zohreh jafari zahra Goodarzywith increasing in production and trade of chickpeas(Cicer arietinum ), the need to improve its production methods is felt more and more, so that in producing countries, research on its cultivation has been given more attention.Today, One of the problems faced by farmer Morewith increasing in production and trade of chickpeas(Cicer arietinum ), the need to improve its production methods is felt more and more, so that in producing countries, research on its cultivation has been given more attention.Today, One of the problems faced by farmers in developing countries is the poor condition of soil structure, which causes problems such as reduced germination rate, uneven growth of germinated plants and as a result of their unequal competition with each other in the use of resources such as light, Nutrients and water, this causes differences in plant biomass and ultimately yield.One of the methods to overcome this problem is the use of seed pretreatment before germination (priming) and in this regard, this study was conducted to investigate the effect of nanopriming (Nano Titanium dioxide) on seed germination and plant growth parameters on (Cicer arietinum ).The results showed nanopriminng with Nano Titanium dioxide was significant on the parameters of stem dry weight and root dry weight but not significant on root length ,stem length ,root wet weight, stem wet weight ,plant wet weight ,total dry weight and speed germination. The studies were performed with SPSS software and Duncan test.Finally, it is concluded that seed pretreatment before germination with Titanium Nanoxide is effective and increases the production of chickpeas, the positive effect of this compound on other plants had been previously reviewed and confirmed. Manuscript profile -
Open Access Article
68 - The effect of titanium dioxide nanoparticles on the expression of genes effective in biofilm production in resistant Klebsiella pneumoniae strains
Marzieh Shafiei kumarss amini Parvaneh JafariBackground and Objectives: The ability of Klebsiella pneumoniae as an opportunistic bacterium in hospital infections, by producing biofilm on food utensils and hospital surfaces, has adverse effects on the treatment and survival of hospitalized patients. The present stu MoreBackground and Objectives: The ability of Klebsiella pneumoniae as an opportunistic bacterium in hospital infections, by producing biofilm on food utensils and hospital surfaces, has adverse effects on the treatment and survival of hospitalized patients. The present study was conducted with the aim of investigating the effect of TiO2 nanoparticles on Klebsiella pneumoniae biofilm formation.Materials and methods: TiO2 nanoparticles were produced using sol-gel method. 62 strains of Klebsiella pneumoniae were isolated from three hospitals in Tehran. Antimicrobial activity of TiO2 nanoparticles against biofilm-producing and antibiotic-resistant strains was determined by disk diffusion method. Definitive identification of the isolates was done through common biochemical tests and 16S rRNA sequencing, and the expression of treC, mrkD, sugE, luxS and 16SrRNA genes was investigated by real time PCR.Findings: The data showed that the ability to form biofilm among isolates obtained from sputum was higher than other isolates. TiO2 nanoparticles with a concentration of 256 μg/ml inhibited biofilm production in fourteen isolated strains. Comparison of LuxS gene expression in Klebsiella pneumoniae untreated and treated with TiO2 showed that the level of gene expression decreased by 3.85 times (p = 0.002).Conclusion: This study showed that the synthesized TiO2 nanoparticles are effective against the formation of biofilm in Klebsiella pneumoniae strains resistant to several drugs and can be reliable and useful as inorganic antimicrobial agents. Manuscript profile -
Open Access Article
69 - Application of Bio-Nanocomposite Films Based on Nano-TiO2 and Cinnamon Essential Oil to Improve the Physiochemical, Sensory, and Microbial Properties of Fresh Pistachio
Arezoo Esfahani Mohammad Reza Ehsani Maryam Mizani Abdorreza Mohammadi Nafchi -
Open Access Article
70 - The Synthesis Of Nanocomposites (MoSi2-20% TiC) is activated by chemical Combustion Synthesis Method (COSHS)
مهدی بدرلو سید علی طیبی فرد محمد ذاکزیAdd titanium carbide in the compound molybdenum disilicide to increased mechanical strength. in this research element of the raw materials used to form MoSi2-TiC nanocomposite. the plan in this research procedure was based on combustion synthesis, chemical activation me MoreAdd titanium carbide in the compound molybdenum disilicide to increased mechanical strength. in this research element of the raw materials used to form MoSi2-TiC nanocomposite. the plan in this research procedure was based on combustion synthesis, chemical activation mechanism (COSHS). in this study, activation of elemental powders Mo, Si, Ti and C were used in chemical oven. first, on the basis of stoichiometric silicon powder raw materials including metal powder, molybdenum, titanium and carbon powder were prepared on the basis of 20% by weight of titanium carbide. to identify chemical compounds that react with itself, provides the heat necessary to react original composition (chemical oven), of compounds that have high ΔG was used. powders and tablets are pressed by uniaxial compaction of composite samples were prepared and chemical oven. synthesizing is done in atmospheric argon controlled tubular furnace the temperature between 700 - 1100 °C. to identify phases, xrd analysis and to evaluate morphology, sem and tem images were used. results show that the best process conditions for synthesis MoSi2-TiC nanocomposite with COSHS method were: temperature 850 °C selected as optimum conditions and composition (8Al + 4Mg + 3SiO2 + 5TiO2) as suitable chemical oven. the grain size calculation by reitveld method showed the size of titanium carbide crystallite and molybdenum disilicide in optimum condition of approximately was 77 nm and above 100 nm respectively. considering the images of sem and tem proved that a nanostructure composite has been synthesized Manuscript profile -
Open Access Article
71 - Study the microstructure and hardness of FSW of API 70 steel at the presence of TiO2 particles
Rasoul Pouriamanesh KAMRAN DehghaniIn this study, the microstructural properties and hardness of Friction Stir Welded (FSWed) of high strength low alloy API X70 steel at the presence of titanium dioxide (TiO2) particles were investigated. In this regard, a homogeneous mixture of TiO2 and X70 steel powder MoreIn this study, the microstructural properties and hardness of Friction Stir Welded (FSWed) of high strength low alloy API X70 steel at the presence of titanium dioxide (TiO2) particles were investigated. In this regard, a homogeneous mixture of TiO2 and X70 steel powders were inserted into the weld groove before applying FSW. The FSW method was applied on HSLA X70 with and without addition of titanium oxide (TiO2) particles. The optical microscopy and Vickers microhardness measurements were employed to evaluate the microstructure and hardness of the different weldments zones. The results showed that the hardness of various zones in the weldment are strongly depended on the microstructure which is affected by heat input and stiring action. In addition, the TiO2 particles were homogenously dispersed in the stir zone of TiO2-doped weldment and subsequently has changed the microstructure and hardness. In particular, a transition from an acicular ferrite (AF) dominant microstructure with a hardness value of 300 HV to a polygonal ferrite (PF) dominant microstructure with a hardness value of 180 HV was observed by moving from top surface region to near root region. Manuscript profile -
Open Access Article
72 - Production of porous TiC preform by the gel casting process in order to synthesize Ti3SiC2 MAX phase via infiltration of preform
حمزه فراتی راد hamidreza baharvandi mohamad maragheThe ternary compound Ti3SiC2 is a representative of materials that exhibit both metals and ceramics characteristics. Similar to metals, this compound is electrical and thermal conductive material, not susceptible to thermal shock and shows plastic properties at high tem MoreThe ternary compound Ti3SiC2 is a representative of materials that exhibit both metals and ceramics characteristics. Similar to metals, this compound is electrical and thermal conductive material, not susceptible to thermal shock and shows plastic properties at high temperature. When considering as a ceramic, it is elastically rigid, lightweight, creep and fatigue resistant and maintains their strengths to high temperatures. In this paper, T3SiC2 bulks have been synthesized by infiltrating Si liquid into porous TiC preforms. High-purity TiC and Si powders with molar ratios of 3TiC:(1 + x)Si (where x = 0.30, 0.50, 1.00) were used as starting powders. Silicon pellets were placed at the top of the precursor pellets as a liquid source. The phase formation and microstructure were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS) system. The results demonstrated that the 50 percent extra silicon results to formation of Ti3SiC2 with 92 wt.% purity. The conditions are favorable for the formation of the SiC secondary phase with increasing the amount of extra silicon to 100 percent. Also, an increase in the amount of extra silicon leads to the formation of Ti3SiC2 with the columnar morphology. Manuscript profile -
Open Access Article
73 - Effect of Tool Rotation Speed on the Mechanical Properties and Corrosion Behavior of Dissimilar Friction Stir Welded of 5083 Aluminium Alloy and Commercially Pure Titanium
Masoud Shabani بهروز شایق بروجنی رضا ابراهیمی کهریزسنگیIn this paper, the effect of tool rotation speed on the mechanical properties and corrosion behavior on dissimilar joints Friction Stir Welds between 5083 Aluminium alloy and pure Titanium is investigated. At first, with primary welding parameters range necessary to ach MoreIn this paper, the effect of tool rotation speed on the mechanical properties and corrosion behavior on dissimilar joints Friction Stir Welds between 5083 Aluminium alloy and pure Titanium is investigated. At first, with primary welding parameters range necessary to achieve suitable connection obtained and then by changing tool rotation speed, mechanical and corrosion properties of heat affected zones, welding zones and cross section zones, by using polarization Tafel test and Electrochemical Impedance Spectroscopy was investigated and the result were compared. the result indicates that corrosion behavior of connections, is impressionable of the tool rotation speed and welding zone and heat affected zones have weaker corrosion resistance compared to the base metals. Manuscript profile -
Open Access Article
74 - Electrical Discharge Machining of Aluminum Matrix Composite Reinforced With Titanium Oxide Nano-Particles
Ali akbar lotfi Saeed Daneshmand.Nano-particles used in metal matrix composites show a various range of mechanical, chemical and physical features, causing significant improvements in mechanical strength, hardness and thermal characteristics. They can also change the capability of machining. Electrica More.Nano-particles used in metal matrix composites show a various range of mechanical, chemical and physical features, causing significant improvements in mechanical strength, hardness and thermal characteristics. They can also change the capability of machining. Electrical discharge machining is considered as an integrate part of hard metal machining. In this paper, the parameters of electrical discharge machining for aluminum composite material improved by Nano-particles of titanium dioxide have been studied. The purpose of this study was to evaluate the impacts of electrical current and voltage and pulse on and off-time on the material removal rate, tool wear rate and surface roughness. Kerosene as a dielectric and copper electrode were used to carry out the experiment. In addition, Analysis of variance was utilized to authenticate the experimental results. The result shows that Nano-particles titanium dioxide has trivial effects on machining parameters due to being insulators. They also do not melt in the process of electrical discharge machining. Moreover, the electrical current and the pulse on time have the most influence on the material removal rate, tool wear rate and surface roughness. By increasing the electrical current and pulse on time, tool wear rate and surface roughness have grown, while by increasing the pulse off time tool wear rate has decreased. The average wear rate of the electrode in the aluminum alloy 2024 reinforced with 5% titanium oxide nanoparticles is 46.3%, equivalent to 0.346 gr, more than the weight loss of the aluminum 2024 specimen. Manuscript profile -
Open Access Article
75 - Investigation of Dynamic and Static Restoration in Hot Deformation of SP-700 Titanium Alloy
Amir hosein Sheikhali Maryam Morakkabti seyed mahdi abbasiIn order to investigation of dynamic and static restoration of SP-700 alloy, in this study continuous and interrupted hot torsion tests carried out at 850 and 1000ºC at different pass-strains and inter-pass times. The dominant mechanism in hot deformation at 1000&d MoreIn order to investigation of dynamic and static restoration of SP-700 alloy, in this study continuous and interrupted hot torsion tests carried out at 850 and 1000ºC at different pass-strains and inter-pass times. The dominant mechanism in hot deformation at 1000°C is dynamic recrystallization (DRX) and consequently the entire microstructure comprises equiaxed grains, whereas at 850°C serration and tanglement of the grain boundaries were observed. Nevertheless, the microstructure of sample twisted at 850°C, indicates the occurrence of DRX and the formation of very fine grains. The mechanism of the formation of recrystallized grains in the vicinity of grain boundaries and triple points is bulging. With an increase in pass-strain (ε=0.5) at 1000°C, due to the increase in driving force for nucleation and growth of new grains, the kinetics of static restoration increases. In fact, at 850°C, in addition to static restoration there is another factor contributing in fractional softening which is β to α phase transformation. Manuscript profile -
Open Access Article
76 - The effect of temperature of equal- chanel angular pressing process on mechanical properties and biocompatibility of titanium dental implant
محمد خدائی Payam Eslamian mahmood meratian Mahdi HadaviBiometals such as stainless steels, tantalum, titanium, cobalt and their alloys are widely used for medical implants for bone and dental healing. Researches indicates that metals such as cobalt, chromium, nickel, aluminum and vanadium, release ion in vivo, which make th MoreBiometals such as stainless steels, tantalum, titanium, cobalt and their alloys are widely used for medical implants for bone and dental healing. Researches indicates that metals such as cobalt, chromium, nickel, aluminum and vanadium, release ion in vivo, which make the human body sensitive to the allergy and so implant lessening. The biocompatibility and non-toxic ion release of titanium is suitable for human body implantation, but it is needed to improve its strength. Nano-structured pure titanium is a newly developed method to increase the strength of implants, and increase their efficiency. In this research some parameters of Equal Chanel Angular Pressing (ECAP) like number of passes and temperature were investigated. After ECAP processing on pure titanium, the mechanical, metallurgical and biological properties of the products were investigated using standard tests. Results indicated that using ECAP process and reducing the titanium grain size from 14 micron to 440 nanometer, its mechanical and biological properties improved. Results of biocompatibility measurement indicated that the processing temperature of 240 ◦C make a very good biocompatibility with Adipose-derived stem cells (ASCs). Also the biocompatibility of titanium increased by increasing the number of the ECAP passes. The processed titanium at 240 ◦C for 4 passes, could be introduced as the choice during the other candidates. Manuscript profile -
Open Access Article
77 - Studying the Wear Behavior of applied coats on Titanium by Chromium Electroplating and Plasma Nitriding Processes
Arvin Taghizadeh Tabrizi Hossein Aghajnai Hasan Saghafian Farhad Farhang LalehThe surface properties of industrial parts and especially wear behavior of them plays an important role in life service of them. Chromium coat and plasma nitriding are two common ways of applying hard coat on diverse substrates. In this paper, both of these coats applie MoreThe surface properties of industrial parts and especially wear behavior of them plays an important role in life service of them. Chromium coat and plasma nitriding are two common ways of applying hard coat on diverse substrates. In this paper, both of these coats applied on titanium substrate as an advanced engineering materials and the wear behavior of them were compared. For this aim, Pin on disk test was carried out and the weight loss was measured. For determining the wear mechanism of the sample, field emission scanning electron microscopy study was carried out on wear traces. Results show that although the achieved surface micro hardness value of chromium coats is higher than nitride samples, 594 HV at current density of 50 A/dm2 and 60 min versus 528 HV at 600 oC for nitride sample, but they show the weaker wear resistance. Adhesive wear mechanism is determined mechanism at both samples. Also, the lowest coefficient of friction is obtained at sample nitride at 600 oC Manuscript profile -
Open Access Article
78 - Analysis of the effect of molybdenum and cobalt additives on the structural and electrical properties of PZT5 piezoceramic material
mohammad hadi hemati hossein lexian mohammad hossein Ghezel Ayagh,The purpose of this paper is to analyze the effect of molybdenum and cobalt additives on the dielectric, ferroelectric and piezoelectric properties of PZT5piezoceramic material By adding molybdenum and cobalt in the location of zirconate and titanate, in the range of (0 MoreThe purpose of this paper is to analyze the effect of molybdenum and cobalt additives on the dielectric, ferroelectric and piezoelectric properties of PZT5piezoceramic material By adding molybdenum and cobalt in the location of zirconate and titanate, in the range of (0-2) percent.For this purpose, the powders were first prepared with a wet chemical method. then They were calcined for 2 hours at 850 ° C. The structural properties of the compounds were investigated using the X-ray diffraction (XRD) method to confirm the formation of single phase compounds (with perovskite structure) at room temperature. The Microstructural analysis of the surface of the sintered discs by scanning electron microscopy (SEM) shows that there is a significant change in grain size with increasing molybdenum and cobalt. Detailed studies of the dielectric properties of PZT In the samples made and tested show measurable change in the piezoelectric charge coefficient D33(Up to 84 ℅ reduction), electromechanical coupling coefficient Keff(Up to 78 ℅ reduction) , resonant frequency Fr(Up to 25 ℅ increase) and mechanical quality factor Qm (Up to 110 ℅ increase). Manuscript profile -
Open Access Article
79 - The effect of addition of aluminum and titanium alloy Tghyyrshklgrm behavior Aynvar
Amir Pahlavani Seyed Mehdi Abbasi Maryam Morakabati Rashid MahdaviPzyrygrm flexible base alloy Fe-36Ni in the cast condition and the presence 05/0 and 04/0 wt% wt% aluminum, titanium in the temperature range ° C1150-850 with strain rate s-101/0 were studied. Microstructural studies showed that the addition of aluminum, aluminum-co MorePzyrygrm flexible base alloy Fe-36Ni in the cast condition and the presence 05/0 and 04/0 wt% wt% aluminum, titanium in the temperature range ° C1150-850 with strain rate s-101/0 were studied. Microstructural studies showed that the addition of aluminum, aluminum-containing deposits such as aluminum oxide structure significantly increases. This strain has been focusing deposits suitable locations, as well as Qflshdn grain boundaries that are leading to the loss of flexibility. Titanic also formed deposits of titanium dioxide and titanium nitride grain size reduction and enhanced flexibility Pzyrygrm. Manuscript profile -
Open Access Article
80 - ساخت نانوکامپوزیت پایه تیتانیوم متراکم شده به روش استاتیکی در فشار های های تراکم گوناگون و بررسی خواص مکانیکی آن
سید مهران زحلی فرزاد فریباامروزه ساخت نانوکامپوزیتها، برای دستیابی به موادی با خواص ترکیبی و بهبود خاصیت مواد، بسیار مورد توجه محققان قرار گرفته است. یکی از بهترین روشهای ساخت نانوکامپوزیتها استفاده از روش متالورژی پودر است. زیرا با این روش علاوه بر اینکه ضایعات به حداقل میرسند میتوان مواد Moreامروزه ساخت نانوکامپوزیتها، برای دستیابی به موادی با خواص ترکیبی و بهبود خاصیت مواد، بسیار مورد توجه محققان قرار گرفته است. یکی از بهترین روشهای ساخت نانوکامپوزیتها استفاده از روش متالورژی پودر است. زیرا با این روش علاوه بر اینکه ضایعات به حداقل میرسند میتوان موادی را که دارای نقطهی ذوب بالا هستند با مواد دارای نقطهی ذوب پایین ترکیب نمود که این کار با روش ریختهگری بسیار دشوار خواهد بود. در این تحقیق آلیاژ تیتانیوم برای بهبود خواص مکانیکی با تقویتکنندهی کاربید سیلیسیم ترکیب شده است. از آنجا که پودر تقویتکنندهی کاربید سیلیسیم در مقیاس نانو می باشد، این دو ماده با هم تشکیل یک نانو کامپوزیت میدهند. روش متالورژی پودر بهترین راه برای ترکیب این دو ماده با هم می باشد. در این تحقیق برای تولید این نانو کامپوزیت، از روش فشردن استاتیکی(دستگاه پرس سرد) استفاده شده است. برای مقایسه، سه درصد مختلف تقویت کنندهی نانوپودر کاربید سیلیسیم و همچنین، سه فشار پرس مورد استفاده قرار گرفته است. همچنین، آزمایشهای چگالی، مشاهده مرزبندی دانهها توسط میکروسکوپ الکترونی رویشی، تست فشار و آزمایش سختی روی آنها انجام گرفت. Manuscript profile -
Open Access Article
81 - A brief review on titanium alloy for dental, biotechnology and biomedical applications
Sharif Heydari Maryam Sadat Mirinejad Mohammd Hossein Malekipour Esfahani Fatemeh Karimian Ali Attaeyan Mehran Latifi -
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82 - Investigation of additive manufacturing of porous Ti-6Al-4V alloy: Geometry analysis for dental applications
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83 - Application of Nanoscience in Self-cleaning Properties of Concrete Facade for Development of Sustainable Environment
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Open Access Article
84 - Manufacturing High-Strength HA-Ti Surface Composites by Friction Stir Processing with Different Filler Mixtures
A Shahbaz Mehrdad Abbasi H SabetIn recent years, a wide range of studies have focused on the surface modification of titanium, especially in terms of its biomedical applications. However, comparatively less researches have been conducted on the fabrication of titanium surface composites in bulk form MoreIn recent years, a wide range of studies have focused on the surface modification of titanium, especially in terms of its biomedical applications. However, comparatively less researches have been conducted on the fabrication of titanium surface composites in bulk form. The primary objective of this investigation is to successfully produce hydroxyapatite (HA)-Ti surface composites with a homogenous dispersion of nano hydroxyapatite particles through friction stir processing (FSP). The secondary aim is to investigate the effect of FSP parameters, specifically filler mixture, on the microstructure and mechanical properties of the composites. Two different mixtures of HA and FSP parameters, traverse speeds of 30 and 45 mm min-1, rotational speed of 1200 rpm, and a conical tool shape, were used. It was found that the samples obtained by a filler mixture of HA-polyvinyl alcohol (PVA) showed better dispersion of HA in the Ti base, as well as higher tensile strength. Also, a 30 mm min-1 traverse speed led to higher strength in both filler mixtures. Therefore, the sample produced by a traverse speed of 30 mm min-1 and HA/PVA filler mixture was selected as the optimum sample. Manuscript profile