期刊
ACTA MATERIALIA
卷 53, 期 2, 页码 477-485出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2004.10.005
关键词
thin film coating; atomic force microscopy; tension test; aluminum; anodization
A ductile metal substrate (1 mm thick Al-5%Mg) with a brittle thin film coating (0.1 mum thick Al2O3) was quasi-statically stretched to induce an array of parallel cracks in the coating. Additional cracking, decohesion, and buckling of the coating with increasing straining were observed using optical, scanning electron, and atomic force microscopes. The number of cracks per unit axial distance and the average opening gap of each crack were found to increase with increasing axial strain. A 2D finite element analysis incorporating a cohesive interface model of cracked coating segments was carried out to obtain both the normal stress distribution in coating segments with various widths and the shear stress distribution along coating-substrate interfaces. Both the fracture strength of the coating and the shear strength of the interface were estimated. Several theoretical analyses appeared in the literature on the cracking and decohesion of thin film coatings were critically discussed. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据