List of Articles تریبولوژی

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  1 - Effect of Strengthening Particles on Microstructure and Tribological Properties of Aluminum Based Nano-composites
  A. Rabiezadeh A. Afsari
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  2 - Microstructural Evaluation and Tribological Properties of Cu/ZrO2 Nano-Composite Produced by Friction Stir Processing
  S. Ghafaei A. Rabiezadeh
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  3 - A review of the effect of nano-lubricant additives on improving the tribological properties of lubricants
  Abbas Taghipoor
       Using nano additives in lubricants is one of the most effective ways to control friction and wear, which is significant for energy conservation, emission reduction, and environmental protection. With scientific and technological development, gre More

       Using nano additives in lubricants is one of the most effective ways to control friction and wear, which is significant for energy conservation, emission reduction, and environmental protection. With scientific and technological development, great advances have been made in nano lubricant additives in scientific research and industrial applications. This review summarizes the categories of nano lubricant additives and illustrates the tribological properties of these additives. Based on the component elements of nanomaterials, nano lubricant additives are discussed in three types, nanometal-based, nanocarbon-based, and nanocomposite-based additives in the review systematically. Moreover, the review summarizes the lubrication mechanisms of nano lubricant additives, including tribofilm formation, micro-bearing effect, self-repair performance, and synergistic effect. At last, the challenges and prospects of nano lubricant additives are proposed, which guide the design and synthesis of novel additives with significant lubrication and antiwear properties in the future. Manuscript profile
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  4 - Synthesis and study of tribological properties of ionic liquids as an ash-free additive package in hydraulic oils
  Shahriar Keshavarzi mohammadreza naeimi jamal mohamad.G Dekamin
  Because of ever-increasing demand for the use of biodegradable lubricants and additives, it is necessary to design and synthesize new additives. In the present study, two ionic liquids with imidazole cations were synthesized and characterized by 1H NMR and FTIR spectra. More

  Because of ever-increasing demand for the use of biodegradable lubricants and additives, it is necessary to design and synthesize new additives. In the present study, two ionic liquids with imidazole cations were synthesized and characterized by 1H NMR and FTIR spectra. The use of ionic liquids based on the imidazolium cation and anion bis(trifluoromethylsulfonyl)amide (TFSA) and tris­(tetrafluoroethyl)trifluorophosphate (FAP) has been investigated. These additives are known to be green additives as these compounds lack zinc, an element prohibited by environmental protection organizations. These materials were used as an additive to ISO 32 grade hydraulic oil. Their lubricating properties, such as cinematic viscosity at 40°C, copper corrosion, 4-ball weld point test, sulfated ash, oil/water separating test, and air release from oil were examined, which showed better results than the ordinary additive zinc dialkyldithiophosphate (ZDDP). Manuscript profile
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  5 - The Effect of Silicon Carbide Ceramic Nanoparticles on the Tribological Properties of SN500HVI Paraffinic Base Oil
  Meisam Makkarian Elham Ameri
  The effect of silicon carbide (SiC) nanoparticles on the tribological properties of the base oil was investigated by friction and wear tests. SiC nanoparticles were synthesized by sol-gel method and added to the base oil at various weight percentages of (0.25, 0.5, 1 an More

  The effect of silicon carbide (SiC) nanoparticles on the tribological properties of the base oil was investigated by friction and wear tests. SiC nanoparticles were synthesized by sol-gel method and added to the base oil at various weight percentages of (0.25, 0.5, 1 and 5). To increase the stability of SiC nanoparticles in the base oil, the surface was modified using oleic acid. To characterize the morphology of SiC nanoparticles, the FT-IR, FESEM and XRD techniques were applied. This investigation was carried out in the base oil SN500HVI from Sepahan Oil Company, Iran. The friction and wear tests were performed on the mixture of SN500HVI/nanoparticles. The tribological properties of nanoparticles in base oil were investigated using pin on disc test according to ASTM G99 test method. Based on the results obtained by XRD, the average size of SiC was known to be less than 30 nm. The mixture of nanoparticles in base oil with concentrations of 0.25, 0.5 and 1 wt.% led to reduction of friction coefficient by 26%, 15%, and 4%, in comparison to pure base oil, respectively. This tribological behavior was due to adhesiveness of nanoparticles on involving surfaces. Furthermore, the topography of worn surfaces was analyzed using FESEM. The results illustrated that the nanoparticles can be an effective additives to improve the quality of lubricants in terms of reducing the friction and wear due to their proper physical properties such as suitable hardness, spherical shape and high specific surface area. Manuscript profile