冲击式压入法的声发射信号表征涂层结合强度可行性研究  

Feasibility Study on Evaluating the Bonding Strength of Coatings by Acoustic Emission Signals from Impact Indentation Method

作　　者：刘明 张伟[1] 王海斗[1] 王海军 王晶晨 刘天寅 LIUMing;ZHANG Wei;WANG Hai-dou;WANG Hai-jun;WANG Jing-chen;LIUTian-yin(National Key Lab for Remanufacturing,Army Academy of Annored Forces,Beijing 100072;Baoji Xin Fu Quan science and Technology Co.,Ltd.,Shaanxi Baoji 721008)

机构地区：[1]陆军装甲兵学院装备再制造技术国防科技重点实验室,北京100072 [2]宝鸡市新福泉科技有限公司,陕西宝鸡721008

出　　处：《热喷涂技术》2018年第2期46-59,共14页Thermal Spray Technology

基　　金：国家自然科学基金项目(51535011);973计划(61328304)

摘　　要：采用配有声发射检测装置的冲击式压入设备分别对基体、金属涂层、有底陶瓷涂层及无底陶瓷涂层进行试验,研究了不同类涂层的表面压痕形貌,分析了各类涂层在冲击过程中产生的声发射信号,并采用K-means聚类算法对所有声发射信号进行聚类。结果表明,金属涂层、有底陶瓷涂层及无底陶瓷涂层的结合强度存在较明显的差异,其在冲击过程中产生的声发射信号也有显著的区别,涂层的结合强度与冲击产生的声发射信号之间存在密切的内在联系,进而得出冲击式压入法可用于检测涂层的结合强度。The impact indentation equipment equipped with acoustic emission detection device is used to test the metal substrate, metal coating, bottom ceramic coating and bottomless ceramic coating respectively. The surface indentation morphology of different kinds of coatings is studied. The acoustic emission signals produced by various coatings during impact are analyzed. K-means clustering algorithm is used to cluster all acoustic emission signals. The results show that the bonding strength of the metal coating, ceramic coating with bonded layer and Ceramic coating without bonded layer is distinctly different, and the acoustic emission signals produced in the impact process are also distinctly different. Therefore, there is a close relationship between the bonding strength of the coating and the acoustic emission signal generated by impact, and the impact indentation method can be used to detect the bonding strength of the coating.

关 键 词：涂层 结合强度 冲击式压入法 声发射信号 K-MEANS聚类算法 

分 类 号：TG174.4[金属学及工艺—金属表面处理]