Microstructure versus Size: Mechanical Properties of Electroplated Single Crystalline Cu Nanopillars

被引：195

作者：

Jennings, Andrew T. ^{[1
]}

Burek, Michael J. ^{[2
]}

Greer, Julia R. ^{[1
]}

机构：

[1] CALTECH, Pasadena, CA 91125 USA

[2] Univ Waterloo, Waterloo, ON N2L 3G1, Canada

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 13期

基金：

美国国家科学基金会;

关键词：

MICRON-SCALE; SUBMICROMETER-PILLARS; UNIAXIAL COMPRESSION; NICKEL MICROCRYSTALS; MICROMETER-SCALE; STRENGTH; PLASTICITY; DEFORMATION; COPPER; MICROPILLARS;

D O I：

10.1103/PhysRevLett.104.135503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report results of uniaxial compression experiments on single-crystalline Cu nanopillars with nonzero initial dislocation densities produced without focused ion beam (FIB). Remarkably, we find the same power-law size-driven strengthening as FIB-fabricated face-centered cubic micropillars. TEM analysis reveals that initial dislocation density in our FIB-less pillars and those produced by FIB are on the order of 10(14) m(-2) suggesting that mechanical response of nanoscale crystals is a stronger function of initial microstructure than of size regardless of fabrication method.

引用

页数：4

共 47 条

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