Sintering through surface motion by the difference in mean curvature
Sintering through surface motion by the difference in mean curvature
复制标题
DOI：
10.1016/s1359-6454(03)00222-2
复制
发表时间：
2003-08
期刊：
影响因子：
9.4
通讯作者：
F. Wakai;F. Aldinger
中科院分区：
文献类型：
--
作者：
F. Wakai;F. Aldinger
烧结过程中原子的扩散改变了颗粒的形貌。当吸附原子的附着动力学比原子的扩散慢时，烧结由发生在界面处的局部过程控制。这种界面控制的烧结，例如通过蒸发-冷凝的烧结，被描述为通过平均曲率与平均曲率的平均值之间的差的表面运动的烧结。通过Surface Evolver程序研究了两个相同球形颗粒的烧结，直到它们达到最终的平衡形状。虽然蒸发-冷凝是一种“非致密化”机制，但收缩是由于颗粒的质心在较长时间内的运动而产生的。收缩率与烧结力近似成正比。
The diffusion of atoms changes the morphology of particles in sintering. When the attachment kinetics of adatoms is slower than the diffusion of atoms, the sintering is controlled by the local processes taking place at the interface. This interface-controlled sintering, for example, the sintering by evaporation–condensation, is described as the sintering through the surface motion by the difference between mean curvature and the average of mean curvature. The sintering of two identical spherical particles has been studied by the Surface Evolver program until they reach the final equilibrium shape. Although the evaporation–condensation is a “non-densifying mechanism”, the shrinkage occurred due to the motion of mass centers of particles in a long time. The shrinkage rate was approximately proportional to the sintering force.