The effects of decreasing layer thickness on the high temperature mechanical behavior of Cu/Nb nanoscale multilayers

被引：38

作者：

Mara, N. A.

Tamayo, T.

Sergueeva, A. V.

Zhang, X.

Misra, A.

Mukherjee, A. K.

机构：

[1] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

[2] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA

[3] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA

来源：

THIN SOLID FILMS | 2007年 / 515卷 / 06期

基金：

美国国家科学基金会;

关键词：

copper; niobium; multilayers; nanostructures;

D O I：

10.1016/j.tsf.2006.01.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure and high temperature mechanical behavior of textured, polycrystalline Cu-Nb nanolayered composites prepared by magnetron sputtering were evaluated. Layer thicknesses of 75, 60, and 40 nm were tested in an effort to investigate the high temperature mechanical properties of freestanding thin film multilayers. Effects of decreasing layer thickness on high temperature properties show a dependence of strength and ductility on layer thickness and test temperature. Fracture surface analysis, along with strain rate jump test results, show boundary sliding as a probable deformation mechanism under certain conditions. The role of elevated-temperature deformation mechanisms such as interlayer and grain boundary sliding are discussed. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：3241 / 3245

页数：5

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