فهرست مقالات layered structure

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  1 - Structural and optical properties of nanocrystalline α-MoO3 thin films prepared at different annealing temperatures
  A. Hojabri F. Hajakbari A. Emami Meibodi
  10.1007/s40094-014-0161-5
  AbstractNanocrystalline α-MoO3 thin films were prepared successfully by thermal annealing of molybdenum (Mo) thin films deposited on quartz and silicon substrates using DC magnetron sputtering method. The influence of annealing temperatures ranging from 400 to 1,000 °C چکیده کامل

  AbstractNanocrystalline α-MoO3 thin films were prepared successfully by thermal annealing of molybdenum (Mo) thin films deposited on quartz and silicon substrates using DC magnetron sputtering method. The influence of annealing temperatures ranging from 400 to 1,000 °C on the structural, morphological and optical properties of the prepared films was investigated by X-ray diffraction, Fourier transform infrared spectrophotometer (FTIR) atomic force microscopic and UV–vis spectroscopy, respectively. The results show that the crystallinity and surface morphology of the films are strongly dependent on the annealing temperature. Also, the optimum annealing temperature of Mo films in our experiment was 600 °C and the films formed at this temperature exhibit only the (0k0) reflections and indicated the layered structure of α-MoO3. The FTIR spectra confirm the formation of MoO3. The transmittance of the MoO3 films on quartz substrate was improved with increasing annealing temperature. پرونده مقاله
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  2 - Thermal Oxidation Times Effect on Structural and Morphological Properties of Molybdenum Oxide Thin Films Grown on Quartz Substrates
  Alireza Hojabri Fatemeh Hajakbari Yalda Ghodrat
  Molybdenumoxide(α-MoO)thin filmswere prepared on quartzand silicon substrates by thermal oxidation of Mo thin films depositedusingDC magnetron sputtering method. Theinfluence of thermal oxidation times ranging from 60-240 min on the structural and morphological pr چکیده کامل

  Molybdenumoxide(α-MoO)thin filmswere prepared on quartzand silicon substrates by thermal oxidation of Mo thin films depositedusingDC magnetron sputtering method. Theinfluence of thermal oxidation times ranging from 60-240 min on the structural and morphological properties ofthe preparedfilms was investigated usingX-ray diffraction,Atomic force microscopy and Fourier transforminfrared spectroscopy. The XRD results revealed that the as depositedfilmwas amorphouswhilethoseformed at thermal oxidationtimes between 60-180 min exhibited polycrystalline orthorhombic molybdenumoxides. Thepresence of (0k0) reflections in XRD patterns indicated the layered structure of α-MoO. Also the surface morphology ofthe films isdependent on the thermal oxidation times. The FTIR spectrum confirmed the formationof MoO3 and the peakat 992.53 cm-1 implythelayered structure of α-MoO3. پرونده مقاله
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  3 - Delamination of Two-Dimensional Functionally Graded Multilayered Non-Linear Elastic Beam - an Analytical Approach
  V Rizov
  Delamination fracture of a two-dimensional functionally graded multilayered four-point bending beam that exhibits non-linear behaviour of the material is analyzed. The fracture is studied analytically in terms of the strain energy release rate. The beam under considerat چکیده کامل

  Delamination fracture of a two-dimensional functionally graded multilayered four-point bending beam that exhibits non-linear behaviour of the material is analyzed. The fracture is studied analytically in terms of the strain energy release rate. The beam under consideration has an arbitrary number of layers. Each layer has individual thickness and material properties. A delamination crack is located arbitrary between layers. The material is two-dimensional functionally graded in the cross-section of each layer. The beam mechanical behaviour is described by a power-law stress-strain relation. The fracture is analyzed also by applying the J-integral approach in order to verify the solution derived for the strain energy release rate. The effects of crack location, material gradient and non-linear behaviour of material on the delamination fracture are evaluated. It is found that the material non-linearity leads to increase of the strain energy release rate. Therefore, the material non-linearity should be taken into account in fracture mechanics based safety design of two-dimensional functionally graded multilayered structural members. It is found also that the delamination behaviour can be effectively regulated by using appropriate material gradients in the design stage of functionally graded multilayered structural members and components. پرونده مقاله
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  4 - Petrology and contact metamorphism of Salafchegan quartz diorite intrusion
  Mahbobe Nazari Shahriar Keshtgar
  The circular Salafchegan quartz diorite intrusion (Aleh Mountain) has intruded into the sandy limestone and sandstone of the Upper Red Formation of Upper Miocene age. It is a concordant pluton and has slightly metamorphosed country rocks. This body is composed of quartz چکیده کامل

  The circular Salafchegan quartz diorite intrusion (Aleh Mountain) has intruded into the sandy limestone and sandstone of the Upper Red Formation of Upper Miocene age. It is a concordant pluton and has slightly metamorphosed country rocks. This body is composed of quartz diorite and could be divided into a layered structures outer part and a massively outcropped central part. These rocks show geochemical calc-alkaline affinity. They could be classified as meta-aluminous, similar to I type granitoids. These rocks are enriched in LILE (Large Ion Lithophile Elements) and LREE (Light Rare Earth Elements) but depleted in HREE (High Rare Earth Elements). In addition, they show negative anomalies of Nb and Ti, with a high Al content. Based on petrographic studies and geochemical analysis, it could be suggested that the parent magma of these rocks was related to a subduction zone and has emplaced in a magmatic arc. The contact aureole of the intrusion is indicated by the existence of minerals such as garnet, epidote, wollastonite and scapolite. The mineral assemblage in the contact aureole is demonstrated that albite-epidote-hornfels facies grade of metamorphism took place to the hornblende hornfels facies. پرونده مقاله