Dislocations in materials with mixed covalent and metallic bonding

被引：19

作者：

Nguyen-Manh, D ^{[1
]}

Cawkwell, MJ

Gröger, R

Mrovec, M

Porizek, R

Pettifor, DG

Vitek, V

机构：

[1] UKAEA, Culham Div, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[2] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

[3] Fraunhofer Inst Mech Mat, D-79108 Freiburg, Germany

[4] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 400卷

基金：

欧盟地平线“2020”; 英国工程与自然科学研究理事会;

关键词：

core structure; non-planar spreading; screw dislocation; gamma-surface energies; tight-binding scheme; environmental dependence; bond-order potentials;

D O I：

10.1016/j.msea.2005.03.081

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Environment-dependent bond-order potentials have been developed for Ll(0) TiAl, bcc Mo and fee In They comprise both the angular character of bonding and the screening effect of nearly free electrons. These potentials have been employed in atomistic studies of screw dislocations that revealed the non-planar character of their cores. It is argued that both covalent as well as metallic character of bonding govern these structures, which in turn control the mechanical behaviour. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：68 / 71

页数：4

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