Relative Energies of Tilt Boundaries in Aluminum Oxide
Relative Energies of Tilt Boundaries in Aluminum Oxide
复制标题
氧化铝中倾斜边界的相对能量
DOI：
--
复制
发表时间：
1968
期刊：
影响因子：
--
通讯作者：
W. D. Scott
中科院分区：
文献类型：
--
作者：
J. Shackelford;W. D. Scott
通过观察一系列含对称倾斜晶界的双晶的热刻槽行为，确定了氧化铝的相对晶界能和表面扩散系数。大倾角(30°~150°)的相对能量基本不变，为0.54。相对能量随倾角的变化符合位错核晶界模型。表面扩散系数为：
真空蚀刻的这一数值与之前空气中蚀刻的数据一致，排除了氧离子作为可能的速率控制扩散物种的可能性。
The relative grain boundary energy and surface diffusion coefficient of aluminum oxide were determined by observing the thermal grooving behavior of a series of bi-crystals containing symmetric tilt boundaries. The relative energy for high tilt angles (30° to 150°) was roughly constant and equal to 0.54. The variation of relative energy with tilt angle was consistent with a dislocation core model for grain boundaries. The surface diffusion coefficient was:
The agreement of this value for a vacuum etch with previous data for etches in air ruled out the oxygen ion as a possible rate-controlling diffusion species.