A Study of Self-Reinforcement Phenomenon in Silicon Nitride by Monte-Carlo Simulation

1998 ◽  
Vol 529 ◽  
Author(s):  
Y. Okamoto ◽  
N. Hirosaki ◽  
H. Matsubara
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Silicon Nitride ◽  
Liquid Phase ◽  
Grain Growth ◽  
Potts Model ◽  
Dominant Factor ◽  
Microstructure Development ◽  
Principal Characteristics ◽  
Grain Growth Model

AbstractA grain growth model based on the results of Monte-Carlo simulations is proposed for silicon nitride. The model was derived from the Potts model; in addition, principal characteristics of silicon nitride such as presence of liquid phase and anisotropy of grain growth were introduced. Employing this model, microstructure development of silicon nitride was investigated.Under certain simulation conditions, several grains grew in preference to other grains, and consequently, a self-reinforced microstructure was produced similar to that of actual silicon nitride. In particular, liquid phase fraction was found to be dominant factor affecting microstructure development.

scholarly journals Characterization and Prediction of Texture in Laser Annealed NiTi Shape Memory Thin Films

2010 ◽  
Author(s):  
Gen Satoh ◽  
Y. Lawrence Yao ◽  
Xu Huang ◽  
Ainissa Ramirez
Keyword(s):  
Thin Film ◽  
Monte Carlo ◽  
Shape Memory ◽  
Grain Growth ◽  
Electron Backscatter Diffraction ◽  
Laser Crystallization ◽  
3 Dimensional ◽  
Shape Memory Properties ◽  
Melting Regime ◽  
Grain Growth Model

Thin film shape memory alloys are a promising material for use in micro-scale devices for actuation and sensing due to their strong actuating force, substantial displacements, and large surface to volume ratios. NiTi, in particular, has been of great interest due to its biocompatibility and corrosion resistance. Effort has been directed toward adjusting the microstructure of as-deposited films in order to modify their shape memory properties for specific applications. The anisotropy of the shape memory and superelastic effects suggests that inducing preferred orientations could allow for optimization of shape memory properties. Limited work, however, has been performed on adjusting the crystallographic texture of these films. In this study, thin film NiTi samples are processed using excimer laser crystallization and the effect on the overall preferred orientation is analyzed through the use of electron backscatter diffraction and x-ray diffraction. A 3-dimensional Monte Carlo grain growth model is developed to characterize textures formed through surface energy induced abnormal grain growth during solidification. Furthermore, a scaling factor between Monte Carlo steps and real time is determined to aid in the prediction of texture changes during laser crystallization in the partial melting regime.

scholarly journals Monte Carlo simulation of grain growth

1999 ◽  
Vol 2 (3) ◽  
pp. 133-137 ◽  
Author(s):  
Paulo Blikstein ◽  
André Paulo Tschiptschin
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Grain Growth

Monte Carlo simulation of the effects of adsorption on interparticle forces

1980 ◽  
Vol 33 (2) ◽  
pp. 231 ◽  
Author(s):  
JE Lane ◽  
TH Spurling
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Liquid Phase ◽  
Degrees Of Freedom ◽  
Distribution Functions ◽  
Radial Distribution Functions ◽  
Monte Carlo Simulation Study ◽  
Interparticle Forces ◽  
Surface Transition ◽  
New Type

A Monte Carlo simulation study of the force between two adsorbing walls is described. The adsorbate is in equilibrium with either a bulk gas or a liquid phase. The force is correlated with the adsorption, singlet and radial distribution functions, all of which vary with the distance of separation of the walls, when this is of the order of a few atomic diameters. When the bulk phase is a gas, a new type of surface transition occurs in which the distance of wall separation is one of the determining degrees of freedom.

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