Microstructural studies of in-situ formed MgB2 phases in a Mg alloy matrix composite

被引：11

作者：

Chen, YX ^{[1
]}

Li, DX

Zhang, GD

机构：

[1] Chinese Acad Sci, Atom Imaging Solids Lab, Met Res Inst, Shenyang 110015, Peoples R China

[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200030, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2002年 / 337卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

MgB2; microstructure; phase transformation;

D O I：

10.1016/S0921-5093(02)00033-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure of in-situ formed MgB2 phases in a Mg alloy matrix composite was studied by means of transmission electron microscopy and high-resolution electron microscopy. The MgB2 phases have hexagonal plate-like inorphology with a remarkable interfacial energy anisotropy. The interfaces between MgB2 and Mg are sharp without any intermediate layer. The interfaces are semi-coherent with a regular arrangement of misfit dislocations. Dislocation loop and 60 dislocation are observed in the MgB2 phases. A phase transformation from MgB2 to Mg is observed and it structural model is proposed to describe the phase transformation process. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：222 / 227

页数：6

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