scholarly journals Basic, extended and combined models for computer simulation of liquid phase sintering

2002 ◽  
Vol 34 (1) ◽  
pp. 41-51 ◽  
Author(s):  
Zoran Nikolic
Keyword(s):  
Computer Simulation ◽  
Liquid Phase ◽  
Grain Boundary ◽  
Boundary Migration ◽  
Simulation Method ◽  
Liquid Phase Sintering ◽  
Grain Boundary Migration ◽  
Two Dimensional ◽  
Dimensional Modeling ◽  
Combined Models

In this study, two-dimensional modeling of microstructural evolution during liquid phase sintering was considered. The simulation method developed is based on basic, extended and combined models defined for diffusion induced grain boundary migration.

scholarly journals Basic and mixed models for computer simulation of liquid phase sintering of a porous structure

2007 ◽  
Vol 39 (1) ◽  
pp. 3-8 ◽  
Author(s):  
Z.S. Nikolic
Keyword(s):  
Computer Simulation ◽  
Liquid Phase ◽  
Porous Structure ◽  
Microstructural Evolution ◽  
Mixed Models ◽  
Liquid Phase Sintering ◽  
Two Dimensional ◽  
Gravitational Effects ◽  
Diffusion Phenomena

A two-dimensional method based on basic and mixed models for simulation of liquid phase sintering of a porous structure will be developed. These models will be tested in order to conduct a study of diffusion phenomena and gravitational effects on microstructural evolution during liquid phase sintering of a W-Ni system.

TEM Analysis of an Alumina Bicrystal Section Using a Fib

2001 ◽  
Vol 7 (S2) ◽  
pp. 326-327
Author(s):  
Jeffrey K. Fairer ◽  
N. Ravishankar ◽  
Joseph R. Michael ◽  
C. Barry Carter
Keyword(s):  
Liquid Phase ◽  
Mass Transport ◽  
Binary Phase Diagram ◽  
Boundary Migration ◽  
Liquid Phase Sintering ◽  
Grain Boundary Migration ◽  
Tem Analysis ◽  
Sem Image ◽  
Polycrystalline Ceramic ◽  
Polycrystalline Ceramic Material

Grain boundary migration (GBM) during the sintering and densification of a polycrystalline ceramic material occurs as a result of mass transport across an interface. When there is a liquid film present, either due to additives used for liquid-phase sintering or unavoidable impurities in the material, the mass transport can be visualized in terms of dissolving material from one grain and precipitating it on another. in order to study the effects of crystallography on GBM in the presence of a liquid phase, alumina bicrystals have been fabricated with anorthite (CaA12Si208) glass films at the interface. The alumina-anorthite system in a bicrystal geometry is used because the pseudo-binary phase diagram of the system is well known, the bicrystal geometry allows for control over the original interface misorientation, and the glassy phase of anorthite is the most commonly occurring glass in commercially used alumina.Fig. 1 is a secondary-electron SEM image of an alumina bicrystal recorded using a field-emission SEM (Hitachi S900) operating at 5 kV.

scholarly journals Computer simulation of free settling and skeletal settling during liquid phase sintering

2006 ◽  
Vol 38 (1) ◽  
pp. 41-54 ◽  
Author(s):  
Z.S. Nikolic
Keyword(s):  
Computer Simulation ◽  
Liquid Phase ◽  
Solid Phase ◽  
Boundary Migration ◽  
Domain Boundary ◽  
Numerical Procedure ◽  
Simulation Models ◽  
Liquid Phase Sintering ◽  
Solid Skeleton ◽  
Two Stages

In recent years, a range of computer simulation models leading to a better understanding of liquid phase sintering phenomena, have been developed with the aim of simulating the detailed evolution of microstructure during grain growth. Some liquid phase sintered materials show both macrostructural and microstructural effects associated with gravity force. Therefore we will develop a numerical procedure for the estimation of how much gravity will influence domain (two-dimensional particle representation) growth, domain boundary migration and solid skeleton formation due to gravity induced segregation during liquid phase sintering. The method used for the simulation of a gravity field will be based on the settling procedure. Gravity induced settling will be separated into two stages - Free Settling and Skeletal Settling. Isolated solid phase domains fall under gravity and slide down over the already settled domains (free settling). During settling they make point contacts with each other. Necks between them then form and start to grow until the equilibrium dihedral angle between the domain boundaries and the liquid is established. Thus a solid skeleton forms and skeletal settling of a connected solid structure takes place. .

scholarly journals Dislocation motion and grain boundary migration in two-dimensional tungsten disulphide

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Amin Azizi ◽  
Xiaolong Zou ◽  
Peter Ercius ◽  
Zhuhua Zhang ◽  
Ana Laura Elías ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Boundary Migration ◽  
Dislocation Motion ◽  
Grain Boundary Migration ◽  
Two Dimensional ◽  
Tungsten Disulphide
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