Sintering forces acting among particles during sintering by grain-boundary/surface diffusion
Sintering forces acting among particles during sintering by grain-boundary/surface diffusion
复制标题
烧结过程中通过晶界/表面扩散作用在颗粒之间的烧结力
DOI：
10.1111/jace.15716
复制
发表时间：
2018
影响因子：
3.9
通讯作者：
Nishiyama Norimasa
中科院分区：
文献类型：
--
作者：
Wakai Fumihiro;Guillon Olivier;Okuma Gaku;Nishiyama Norimasa
烧结过程中的微观结构演变涉及孔道的形成和夹断。三维中3个颗粒的烧结是研究孔道夹断的简单模型。我们使用Brakke的Surface Evolver程序模拟了3种颗粒的固态烧结，该程序结合了晶界扩散和表面扩散。孔道的夹断将烧结过程分为两个阶段：初期和后期。接触区域具有由表面三重连接和后期三重连接限定的非圆形形状。提出了一种确定非圆接触烧结力的一般方法。致密化的机械方法，其中颗粒的相对运动由烧结力和施加的力驱动，不仅适用于初始阶段，而且适用于后期阶段。
The microstructural evolution during sintering involves the formation and pinch‐off of pore channels. The sintering of 3 particles in 3 dimensions is a simple model for studying the pinch‐off of a pore channel. We simulate the solid‐state sintering of 3 particles by using Brakke's Surface Evolver program, which incorporates coupled grain‐boundary diffusion and surface diffusion. The pinch‐off of pore channel divides the sintering process into 2 stages; the initial stage and the later stage. The contact area has a noncircular shape bounded by both surface triple junction and triple junction in the later stage. A general method is presented to determine the sintering force acting on the noncircular contact. The mechanical approach of densification, where the relative motion of particles is driven by both sintering force and applied force, is applicable not only for the initial stage, but also for the later stage.