摘要
The wavelet transform is applied to the analysis of acoustic emission signals collected during tensile test of the ZrO2-8% Y2O3 (YSZ) thermal barrier coatings (TBCs). The acoustic emission signals are de-noised using the Daubechies discrete wavelets, and then decomposed into different wavelet levels using the programs developed by the authors. Each level is examined for its specific frequency range. The ratio of energy in different levels to the total energy gives information on the failure modes (coating micro-failures and substrate micro-failures) associated with TBCs system.
The wavelet transform is applied to the analysis of acoustic emission signals collected during tensile test of the ZRO2-8% Y2O3 （YSZ） thermal barrier coatings （TBCs）. The acoustic emission signals are de-noised using the Daubechies discrete wavelets, and then decomposed into different wavelet levels using the programs developed by the authors. Each level is examined for its specific frequency range. The ratio of energy in different levels to the total energy gives information on the failure modes （coating micro-failures and substrate micro-failures） associated with TBCs system.
出处
《中国有色金属学会会刊：英文版》
CSCD
2006年第B01期270-275,共6页
Transactions of Nonferrous Metals Society of China
基金
Project(10525211, 50531060) supported by the National Natural Science Foundation of China
关键词
热障涂料
声发射信号
小波分析
拉伸试验
无损检测
wavelet transform
acoustic emission
tensile test
thermal barrier coatings
failure modes
