Acoustic emission analysis on tensile failure of air plasma-sprayed thermal barrier coatings
Acoustic emission analysis on tensile failure of air plasma-sprayed thermal barrier coatings
复制标题
空气等离子喷涂热障涂层拉伸失效的声发射分析
DOI：
10.1016/j.surfcoat.2012.03.050
复制
发表时间：
2012-05
影响因子：
5.4
通讯作者：
Y.C. Zhou
中科院分区：
文献类型：
--
作者：
W.B. Yao;C.Y. Dai;W.G. Mao;C. Lu;L. Yang;Y.C. Zhou
采用声发射技术对热障涂层在拉伸载荷作用下的开裂行为和断裂过程进行了监测。对声发射信号进行快速傅里叶变换，提取其特征频谱和优势频带，揭示断裂模式。三个不同的特征频带被确认，对应于基板变形，表面垂直开裂和界面脱层，借助扫描电子显微镜观察。建立了空气等离子喷涂热障涂层拉伸破坏机理图。断裂强度和界面剪切强度分别为45.73±3.92MPa和20.51±1.74MPa，与已有结果吻合较好。
An acoustic emission technique was used to monitor the cracking behavior and fracture process of thermal barrier coatings subjected to tensile loading. Acoustic emission signals were extracted and preformed by fast Fourier transform, and their characteristic frequency spectrums and dominant bands were obtained to reveal fracture modes. Three different characteristic frequency bands were confirmed, corresponding to substrate deformation, surface vertical cracking and interface delamination, with the aid of scanning electronic microscopy observations. A map of the tensile failure mechanism of air plasma-sprayed thermal barrier coatings was established. The fracture strength and interfacial shear strength were estimated as 45.73±3.92MPa and 20.51±1.74MPa, respectively, which are well in agreement with available results.
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影响因子：
5.4
作者：
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通讯作者：
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影响因子：
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通讯作者：
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