FCC：BCC部分共格界面台阶结构模型

用计算机研究了FCC:BCC部分共格界面结构随取向关系改变而发生的变化。据此建立了不同位向关系下两相界面台阶结构模型。分析表明,当 α~(f∝)/α~(b∝)=1.26,位向关系从K—S关系变化到N—W关系,表观惯习面与原子惯习面间偏转角随位向而变化,其值从约12°增大到约30°。研究发现,对于不同惯习偏转角的相界台阶模型,失配位错不是必不可少的的结构要素。

The Ledge Structural Models of FCC:BCC Partially Coherent Interface

The structure of FCC: BCC partially coherent interface is simulated by computer. The results show that the interface structure is varied with the orientation relationships. The structural models of varied orientations are made, which are defined by the lattice parameter ratio afcc/abcc= 1. 26 and ranged from K-S to N-W orientation relationship. The amount of deviation of the apparent habit plane from atomic habit plane {111}fcc is a function of orientation,and ranges from ca. 12 degrees to ca. 30 degrees. Computer simulations also found that the misfit dislocations could not be certain to exiet on the FCC:CC partially coherent interface.