HRTEM study of Co7W6 and its typical defect structure

被引：52

作者：

Carvalho, PA ^{[1
]}

Haarsma, HSD ^{[1
]}

Kooi, BJ ^{[1
]}

Bronsveld, PM ^{[1
]}

De Hosson, JTM ^{[1
]}

机构：

[1] Univ Groningen, Netherlands Inst Met Res, Ctr Mat Sci, Dept Appl Phys, NL-9747 AG Groningen, Netherlands

来源：

ACTA MATERIALIA | 2000年 / 48卷 / 10期

关键词：

intermetallic compounds; microstructure; transmission electron microscopy (TEM); image analysis; ab initio calculations;

D O I：

10.1016/S1359-6454(00)00064-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The tetrahedrally close-packed structure of Co7W6 (mu-phase) was studied by HRTEM. A massive presence of random sub-unit cell twins was detected. These planar defects were characterized in detail and the twinning probability at potential mirror planes was established. High-precision image simulation of the bulk structure and defect region was performed, using a simulated evolution optimization strategy to refine the imaging conditions. Ab initio calculations were carried out in order to determine the energy involved in twinning, as well as the distortion induced in the structure. (C) 2000 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：2703 / 2712

页数：10

共 32 条

[1] THE SYSTEM NIAL2O4-NI2SIO4 AT HIGH-PRESSURES AND TEMPERATURES - SPINELLOIDS WITH SPINEL-RELATED STRUCTURES [J].