表面弛豫效应对界面区域CBED的影响  

EFFECT OF SURFACE RELAXATION ON CBED FROM REGIONS CONTAINING AN INTERFACE

作　　者：邹化民[1] 王仁卉[1] 戴明星[1] 鄢炎发 潘进[2] 

机构地区：[1]武汉大学物理学系,武汉430072 [2]国防科技大学五系

出　　处：《武汉大学学报（自然科学版）》1994年第5期52-58,共7页Journal of Wuhan University(Natural Science Edition)

基　　金：湖北省自然科学基金资助的课题

摘　　要：对Al_2O_3颗粒增强铝复合材料与K_2Ti_5O_(13)晶须增强铝复合材料中的增强相/金属界面区域点阵位移场进行CBED研究,并对其进行电子衍射动力学理论模拟计算,结果表明:表面弛豫效应对晶须/铝界面法线方向上位移分量大小的分布影响显著,而对界面切线方向上位移分量的影响很小。这一结果对于解决CBED法测量界面应变场时遇到的表面弛豫效应问题是有意义的。Investigations on the lattice displacement fields in the vicinties of A12O3/A1 and K2Ti6O13w/Al interface were carried out by means of convergent beam electron diffrac-tion. The CBED experimental observations and computer simulations based on the dynamical theory of electron diffraction show that the surface relaxation has relatively strong influence on the displacement components in the direction perpendicular to the interface, but very weak effect on the displacement components in the plane of the interface. This result can be very useful in dealing with the surface relaxation effect encountered in determining strain fields of interfaces with CBED techmique.

关 键 词：表面驰豫 金属复合材料 CBED 复合材料 

分 类 号：TB331[一般工业技术—材料科学与工程]