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sintering-condition
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Sintering characterizations of Ag-nano film on silicon substrate
, Article Advanced Materials Research ; Volume 829 , 2014 , Pages 342-346 ; ISSN: 10226680 ; ISBN: 9783037859070 ; Akbari, J ; Movahhedi, M. R ; Alemohammad, H ; Sharif University of Technology
Abstract
Nowadays, thin films have many applications in every field. So, in order to improve the performance of thin film devices, it is necessary to characterize their mechanical as well as electrical properties. In this research work we focus on the development of a model for the analysis of the mechanical and electrical properties of silver nanoparticles deposited on silicon substrates. The model consists of inter-particle diffusion modeling and finite element analysis. In this study, through the simulation of the sintering process, it is shown that how the geometry, density, and electrical resistance of the thin film layer are changed with sintering conditions. The model is also used to...
Numerical study of material properties, residual stress and crack development in sintered silver nano-layers on silicon substrate
, Article Scientia Iranica ; Volume 23, Issue 3 , 2016 , Pages 1037-1047 ; 10263098 (ISSN) ; Movahhedy, M. R ; Akbari, J ; Alemohammad, H ; Sharif University of Technology
Sharif University of Technology
2016
Abstract
In order to improve the performance of thin film devices, it is necessary to characterize their mechanical, as well as electrical, properties. In this work, a model is developed for analysis of the mechanical and electrical properties and the prediction of residual stresses in thin films of silver nanoparticles deposited on silicon substrates. The model is based on inter-particle diffusion modeling and finite element analysis. Through simulation of the sintering process, it is shown how the geometry, density, and electrical resistance of the thin film layers are changed by sintering conditions. The model is also used to approximate the values of Young's modulus and the generated residual...
The effects of composition and sintering conditions on Zirconia Toughened Alumina (ZTA) nanocomposites
, Article Advanced Materials Research, 7 December 2009 through 9 December 2009 ; Volume 93-94 , December , 2010 , Pages 695-698 ; 10226680 (ISSN) ; 9780878492855 (ISBN) ; Nemati, A ; Salahi, E ; Sharif University of Technology
2010
Abstract
Zirconia Toughened Alumina (ZTA) Nanocomposites were prepared using Nano sized Zirconia (ZrO2) powders doped with 3% mol of yttria (Y 2O3) nanopowders. Diffusion of α-alumina (Al 2O3) nanoparticles as well as yttria into the Zirconia lattice network drives monoclinic - tetragonal martensitic transformation. Zirconia toughened alumina (ZTA) composites containing different amount of partially stabilized Zirconia (PSZ) 5, 10, 15 and 20% mol, were prepared via wet mixing and axial pressing. After sintering at different temperatures,1450, 1550 and 1650 °C, phase change in the samples were monitored. X-ray diffraction patterns showed that at constant composition, tetragonal zirconia was increased...