Strengthening in gold nanopillars with nanoscale twins

被引：185

作者：

Afanasyev, Konstantin A.

Sansoz, Frederic ^{[1
]}

机构：

[1] Univ Vermont, Sch Engn, Burlington, VT 05405 USA

[2] Univ Vermont, Dept Phys, Burlington, VT 05405 USA

来源：

NANO LETTERS | 2007年 / 7卷 / 07期

关键词：

D O I：

10.1021/nl070959l

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The role of growth twin boundaries on the slip activity of gold nanopillars under uniaxial compression was investigated by molecular dynamics simulation. A new type of size-dependent strengthening was found in twinned gold nanopillars. Strengthening resulted from slip arrests in the form of Lomer-Cottrell locks at the intersection of partial dislocations and twin boundaries. The significance of such phenomenon was found to depend on the twin size. These findings could help engineers design tunable mechanical properties in nanowires by interfacial plasticity.

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收藏

页码：2056 / 2062

页数：7

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