Anisotropic sintering stress for sintering of particles arranged in orthotropic symmetry
Anisotropic sintering stress for sintering of particles arranged in orthotropic symmetry
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DOI：
10.1016/j.actamat.2009.04.049
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发表时间：
2009-08
期刊：
影响因子：
9.4
通讯作者：
F. Wakai;Y. Shinoda
中科院分区：
文献类型：
--
作者：
F. Wakai;Y. Shinoda
当颗粒堆积不是各向同性时，许多烧结体以各向异性方式收缩。各向异性收缩的热力学驱动力，即烧结应力张量，是针对三维正交各向异性对称的开孔结构进行数值确定的。采用能量法、力平衡法和体积平均法严格计算烧结应力张量。烧结应力的偏分量与斜方体积元的纵横比的对数近似成正比，并且在大多数情况下起到使细长颗粒变形为更加各向同性的作用。
Many sintering bodies shrink in an anisotropic manner when the particle packing is not isotropic. The thermodynamic driving force for the anisotropic shrinkage, i.e. the sintering stress tensor, is determined numerically for an open pore structure with orthotropic symmetry in three dimensions. The sintering stress tensor is calculated rigorously by the energy method, the force balance method and the volume averaging method. The deviatoric component of sintering stress is approximately proportional to the logarithm of the aspect ratio of the orthorhombic volume element, and acts so as to deform the elongated particles to be more isotropic in most cases.