晶体位错的离散弹性模型——位错中心结构和P-N力

在离散弹性模型中考虑了位错中心位错密度分布的影响,计算了fcc和bcc两种各向同性弹性介质中,不同中心结构的螺型位错的自能、等效内截半径与位错中心位置的关系,估算了不同滑移面上P-N力。讨论了原子热振动对P-N力的影响,比较了离散弹性方法与现有其它方法的结果,据信离散弹性方法是一种进一步进行更深入计算的有效方案。 关键词：

DISCRETE ELASTIC MODEL FOR CRYSTAL DISLOCATION——CORE STRUCTURE AND P-N FORCE

The effect of the distribution of dislocation density in the core region is taken into account in the discrete elastic approach. The self-energies, effective inner cut radii, as functions of the position of dislocation center are calculated for screw dislocations with different core structures in isotropic elastic fcc and bcc lattices. The P-N forces for different slip planes are estimated.The effect of the thermal motion of atoms on P-N force is discussed. This discrete elastic approach is compared with other methods. We believe that the discrete elastic approach is an effective method for comprehensive investigation