Suppression of Catastrophic Failure in Metallic Glass-Polyisoprene Nanolaminate Containing Nanopillars

被引：49

作者：

Kim, Ju-Young ^{[1
]}

Gu, Xun ^{[2
]}

Wraith, Matt ^{[3
]}

Uhl, Jonathan T. ^{[3
]}

Dahmen, Karin A. ^{[3
]}

Greer, Julia R. ^{[2
]}

机构：

[1] UNIST, Sch Mech & Adv Mat Engn, Ulsan 689798, South Korea

[2] CALTECH, Dept Appl Phys & Mat Sci, Pasadena, CA 91125 USA

[3] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

来源：

ADVANCED FUNCTIONAL MATERIALS | 2012年 / 22卷 / 09期

基金：

美国国家科学基金会;

关键词：

metallic glass; nanostructures; catastrophic failure; organic-inorganic nanocomposites; THIN-FILM; BULK; SIZE; COMPRESSION; STRENGTH; PLASTICITY; MECHANISM; DIAMETER; BEHAVIOR; PILLARS;

D O I：

10.1002/adfm.201103050

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

One considerable concern in metallic glass is enhancing ductility by suppressing catastrophic failure by the instantaneous propagation of shear bands. Compressed nanopillars with alternating CuZr metallic glass and polyisoprene nanolaminates exhibit >30% enhancement in plastic flow, as compared with monolithic glass, without sacrifice of strength. A suppression of stochastic strain burst signature in these metallic glass-polymer composites is reported, which is an undesirable characteristic ubiquitously present in monolithic metallic glass and in metallic glass-metal composites. The intermittent stochastic signature is quantified in each metallic glass-containing nanolaminate system by constructing histograms of burst size distributions and provide theoretical foundation for each behavior. The exceptional mechanical properties emergent in these MG-polymer nanolaminate composites are attributed to the combination of nanometer size-induced shear band suppression in metallic glasses and the damping capability of the polyisoprene layers.

引用

页码：1972 / 1980

页数：9

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