Analysis at atomic level of dislocation emission and motion around nanoindentations in gold

被引:24
作者
Carrasco, E [1 ]
González, MA [1 ]
de la Fuente, OR [1 ]
Rojo, JM [1 ]
机构
[1] Univ Complutense, Dept Fis Mat, E-28040 Madrid, Spain
关键词
surface defects; scanning tunneling microscopy; gold; surface structure; morphology; roughness; and topography; low index single crystal surfaces;
D O I
10.1016/j.susc.2004.09.017
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Scanning tunnelling microscopy of a reconstructed Au(001) surface shows that two types of dislocation configuration are created by nanoindentation: 'mesa'-shaped dislocation loops and 'screw' dislocation loops. We analyse the generation of these loops at the initial stages of plastic deformation of the surface, their glide and cross-slip and their interaction with existing steps on the surface. We also show that the standard dislocation theory for an elastic continuum adequately explains the observed dislocation configurations, their spatial distribution, motion and interaction with other defects. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:467 / 475
页数:9
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