Dislocation core structures in YAg, a ductile B2CsCl-type intermetallic compound

被引：31
|
作者：
Xie, S. [1 ]
Russell, A. M. [1 ,2 ]
Becker, A. T. [1 ,2 ]
Gschneidner, K. A., Jr. [1 ,2 ]
机构：
[1] Iowa State Univ, Mat & Engn Phys Program, Ames Lab US DOE, Ames, IA 50011 USA
[2] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA
来源：
SCRIPTA MATERIALIA | 2008年 / 58卷 / 12期
关键词：
intermetallic compound; HRTEM; dislocation structure; stacking fault; antiphase boundary;
D O I：
10.1016/j.scriptamat.2008.01.055
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Dislocations are thought to be the primary mechanism for plastic deformation in the ductile B2 YAg compound, but no reports have been made on whether partial dislocations are operating. Here, direct observations made by high-resolution transmission electron microscopy show that in YAg superlattice dislocations dissociate into two superpartials bound to either a stacking fault or an antiphase boundary. A better understanding of dislocation core structures in YAg should improve the understanding of deformation mechanisms in the family of ductile rare-earth B2 intermetallics. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1066 / 1069
页数：4
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