Deformation of interparticle necks by diffusion-controlled creep

被引:0
|
作者
Bouvard, D [1 ]
McMeeking, RM [1 ]
机构
[1] UNIV CALIF SANTA BARBARA,DEPT MECH & ENVIRONM ENGN,SANTA BARBARA,CA 93106
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中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The deformation of a neck between two spherical particles of the same size by coupled grain-boundary and surface diffusion has been simulated numerically through the finite-difference method, In the case of pure sintering where there is no applied stress, the results agree quite well with simple analytical models. When a force is applied, it is found that they do not deform as truncated spheres, even when surface diffusion is much faster than grain-boundary diffusion, Expressions are given representing the rate of approach of the particles and the rate of growth of the neck as a function of the current neck radius and the applied stress.
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页码:666 / 672
页数:7
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