On the mechanical behavior of brittle coatings and layers
On the mechanical behavior of brittle coatings and layers
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DOI：
10.1007/bf00656841
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发表时间：
1983-12
影响因子：
2.2
通讯作者：
A. Evans;G. B. Crumley;R. E. Demaray
中科院分区：
文献类型：
--
作者：
A. Evans;G. B. Crumley;R. E. Demaray
本文探讨了几个重要的问题有关的机械性能的涂层，薄膜和层。主要重点放在残余应力及其对涂层机械失效的影响的描述。残余应力取决于涂层或氧化过程的细节，基板的一般曲率，涂层-基板界面的波纹度，和涂层的应力松弛特性。描述了残余应力引起的涂层失效，包括涂层断裂或剥落。后者通常更为严重，受到了主要关注。结果表明，剥落的涂层是屈曲的后果，当涂层受到显着的残余压缩。诱导屈曲和随后的剥落所需的条件进行了说明。
This paper examines several important issues concerning the mechanical properties of coatings, films, and layers. Major emphasis has been placed on descriptions of residual stresses and their influence on mechanical failure of the coating. The residual stresses are shown to depend on the details of the coating or oxidation process, the general curvature of the substrate, the waviness of the coating-substrate interface, and the stress relaxation characteristics of the coating. Residual stress-induced coating failures, which consist either of coating fractures or spalling, are described. The latter is usually more serious and has been afforded primary attention. It is shown that spalling of the coating is a consequence of buckling, when the coating is subject to significant residual compression. The conditions needed to induce buckling and subsequent spalling are described.