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
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.
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页数:4
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