β′-FeAl和β′-NiAl的电荷密度分布与位错结构和形变行为的关系

Relationship of Distribution of Electron Charge Density with Dislocation Structure and Deformation Behavior in β′FeAl and β′NiAl

用定量电子晶体学方法分别测定了β′－ＦｅＡｌ和β′－ＮｉＡｌ的８个低指数结构因子值，以此为基础再加上理论计算的高指数结构因子值进行数理转换得到了β′－ＦｅＡｌ、β′－ＮｉＡｌ的电荷密度分布，并绘制出β′－ＦｅＡｌ、β′－ＮｉＡｌ的（１１０）面电荷密度分布图。根据电荷密度分布图和成键理论，对β′－ＦｅＡｌ、β′－ＮｉＡｌ中的键结合情况进行了分析。对电荷密度分布及键结合情况与位错结构、形变行为进行了研究，从电荷密度分布层次解释了β′－ＦｅＡｌ、β′－ＮｉＡｌ的形变和位错的一些特性。

Eight lower order structure factors of β′FeAl and β′NiAl have been accurately measured by the quantitative electron crystallography method. Based on the set of measured lower order structure factors and calculated higher order structure factors, the distributions of electron charge density in β′FeAl and β′NiAl are obtained. According to the distributions of electron charge density and chemistry bonding theory, the bondings in β′FeAl and β′NiAl are studied. Based on these results, the dislocation structures and deformation behaviors of β′FeAl and β′NiAl are studied. Thereof, some characteristics concerning deformation and dislocation in β′FeAl and β′NiAl are explained.