Modelling of anisotropic sintering in crystalline ceramics
Modelling of anisotropic sintering in crystalline ceramics
复制标题
晶体陶瓷各向异性烧结的建模
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Braginsky
中科院分区：
文献类型：
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作者：
E. A. Olevsky *;B. Kushnarev;A. Maximenko;V. Tikare;M. Braginsky
我们提出了一个模型，描述各向异性收缩在烧结过程中的粉末压块的对齐，细长颗粒通过推导各向异性烧结应力和各向异性广义粘度作为材料和几何参数的函数。粉末压块由细长颗粒组成，这些颗粒完美地对齐并且在颗粒之间的所有方形连接处简单地填充有椭圆形孔。该模型考虑了晶界扩散和表面扩散的质量输运。收缩率计算为各种几何形状，并进行比较动力学蒙特卡罗模拟。
We present a model that describes anisotropic shrinkage during sintering in a powder compact of aligned, elongated particles by deriving the anisotropic sintering stress and the anisotropic generalized viscosity as a function of material and geometric parameters. The powder compact consists of elongated particles, which are perfectly aligned and simply packed with elliptical pores at all the quadra-junctions between the particles. The model considers mass transport by grain boundary diffusion and surface diffusion. Shrinkage rates are calculated for a variety of geometries and are compared to kinetic Monte Carlo simulations.