Evaluation of Residual Stress in Ceramic Coatings and Its Size Effects

被引：0

作者：

Bao Y. ^{[1
,2
]}

Ma D. ^{[1
,2
]}

机构：

[1] China Building Materials Academy, State Key Laboratory for Green Building Materials, Beijing

[2] China Building Material Test and Certification Group Co., Ltd, Beijing

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2019年 / 47卷 / 08期

关键词：

Ceramic coatings; Residual stress; Size effect; Stoney formula;

D O I：

10.14062/j.issn.0454-5648.2019.08.01

中图分类号：

学科分类号：

摘要：

When a flat strip sample is coated with a one-sided coating, the bending deformation often occurs because of the mismatch of the expansion coefficients between coatings and the substrate, thus the residual stresses exist in the coatings and substrate. The residual stress in the coating can be calculated by the curving radius and the thicknesses of the coatings and the substrate. This method is called the Stoney method. The coating causing the bending deformation in the sample is defined as type I coating, while that without the bending deformation is defined as type II coating. Since the residual stress is not a constant of material, the residual stress of type I coating measured by the Stoney method does not represent the residual stress of type II coating, which widely used in engineering. If a relationship between the residual stresses of type I coating and type II coating can be established, the residual stress of any coated component can be evaluated via the Stoney method. Based on the relative method, the relationship of residual stresses for two kinds of coatings was derived. The residual stresses of the symmetrical ceramic coatings on metal substrates were measured. The theoretical and experimental results indicate that this novel method is simple and convenient to evaluate the residual stress for various coated components, especially for the coated sample without the bending deformation. © 2019, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：1033 / 1038

页数：5

共 18 条

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