Evaluating Bending Strength of Plasma Sprayed Al2O3 Coatings |
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| Authors: | Zhijian Yin Shunyan Tao Xiaming Zhou Chuanxian Ding |
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| Affiliation: | (1) The Key Laboratory of Inorganic Coatings, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P.R. China;(2) Graduate School of the Chinese Academy of Sciences, Beijing, 100039, China |
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| Abstract: | The bending strength of plasma sprayed Al2O3 coatings was evaluated using three-point bending tests. The measured strength data sets were statistically analyzed by employing Weibull distribution. It was found that the bending strength values of coatings show obvious anisotropic behavior. Additionally, the bending strength values measured by loading parallel to the spraying direction are lower than those antiparallel to the spraying direction, and larger variability was realized for the former. This may be related mainly to the distribution of residual stress and microstructural defects within coatings. |
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| Keywords: | Al2O3 bending strength plasma spray residual stress Weibull plot |
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