Influence of Homogeneous Interfaces on the Strength of 500 nm Diameter Cu Nanopillars

被引：85

作者：

Jang, Dongchan ^{[1
]}

Cai, Can ^{[2
]}

Greer, Julia R. ^{[1
]}

机构：

[1] CALTECH, Div Engn & Appl Sci, Pasadena, CA 91125 USA

[2] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 04期

关键词：

Nanopillars; nanocrystalline; nanotwins; uniaxial compression; nanomechanics; MECHANICAL-PROPERTIES; NANOCRYSTALLINE; DEFORMATION; STRAIN; GOLD;

D O I：

10.1021/nl2003076

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Interfaces play an important role in crystalline plasticity as they affect strength and often serve as obstacles to dislocation motion. Here we investigate effects of grain and nanotwin boundaries on uniaxial strength of 500 nm diameter Cu nanopillars fabricated by e-beam lithography and electro-plating. Uniaxial compression experiment's reveal that strength is lowered by introducing grain boundaries and significantly rises when twin boundaries are present. Weakening is likely due to the activation of grain-boundary-mediated processes, while impeding dislocation glide can be responsible for strengthening by twin boundaries.

引用

页码：1743 / 1746

页数：4

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