压入法表征涂层结合强度的声发射信号分析  

Acoustic Emission Signal Analysis of Coating Bonding Strength by Pressing Method

作　　者：满孝峰 MAN Xiaofeng(91951 Troops People's Liberation Army,Yantai Shandong 265100)

机构地区：[1]91951部队

出　　处：《河南科技》2019年第25期55-59,共5页Henan Science and Technology

基　　金：国家自然科学基金面上项目（51175513）

摘　　要：采用超音速等离子喷涂技术制备以AlSi为底层,AT13为面层的涂层,对涂层组织和基本性能进行表征和测试;采用表面压入法诱导涂层损伤失效,声发射技术实时在线监测压入过程;采用SEM对涂层压痕形貌进行分析;运用小波分解法,对所得的声发射信号进行噪声分析。结果表明,表面压入法在有效诱导涂层体系损伤失效的同时,声发射信号可给出明显突变提示,声发射信号主要由涂层体系声发射源产生,夹杂非常微弱的噪声信号。与原始信号相比,噪声信号很小,分析试验结果时可以忽略不计。The coating of Al-Si as the bottom layer and AT13 as the surface layer was prepared by supersonic plasma spraying technology.The microstructure and basic properties of the coating were characterized and tested.The coat ing failure were induced by surface compaction,and the pressing process was monitored online in real time by acous tic emission technology.SEM was used to analyze the indentation morphology of the coating.Using the wavelet meth od,the noise analysis of acoustic emission signal.The results show that surface pressure induced damage failure of the coating,and the acoustic emission signal could yield significant mutations.Acoustic emission signals are mainly generated by acoustic emission sources of coating system,with very weak noise signals.Compared with the original signal,the noise signal is very small and can be ignored.

关 键 词：涂层 结合强度 压入法 声发射技术 小波分析 

分 类 号：TG174.442[金属学及工艺—金属表面处理]