EB-PVD热障涂层微观损伤行为  

Microstructural Damage Behviour of a Thermal Barrier Coating Fabricated by EB-PVD

作　　者：姜涛 刘德林 刘洲 牟仁德 何利民 JIANG Tao;LIU De-lin;LIU Zhou;MU Ren-de;HE Li-min(AECC Beijing hlstitute of Aeronautical Materials,Beijing 100095,China;Failure Analysis Center of Aviation Industry Corporation of China,Beijing 100095,China;Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation,Beijing 100095,China;Aviation Key LaboratoU of Science and Technology on Materials Testing and Evaluation,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]航空工业失效分析中心,北京100095 [3]航空材料检测与评价北京市重点实验室,北京100095 [4]材料检测与评价航空科技重点实验室,北京100095

出　　处：《失效分析与预防》2018年第4期261-267,共7页Failure Analysis and Prevention

摘　　要：针对EB-PVD制备的热障涂层,通过对拉伸、疲劳、持久、撞击、慢速压缩、三点弯曲、振动等单一条件下,以及热循环、热冲击、超温等复合条件下涂层微观损伤特点进行观察,结合机械应力、热应力特点以及涂层氧化损伤过程,对热障涂层微观损伤类型进行划分。总结归纳出陶瓷层晶簇间垂直裂纹、陶瓷层水平台阶裂纹、陶瓷层V形崩裂、柱状晶弯折、柱状晶簇崩落、等轴晶区水平裂纹、陶瓷层水平撕裂、陶瓷层微鼓分离、氧化层破碎、粘结层内氧化、粘结层垂直裂纹、粘结层裂纹钝化、粘结层皱曲等13种损伤形式,这些基本损伤构型的归纳总结有助于对热障涂层复杂环境下失效行为的深入研究。In this paper,the damage behaviour of a thermal barrier coating（ TBC） produced using ED-PVD method was investigated on the basis of microstructure analysis. One of such mechanical loadings as tensile,fatigue,creeping,impact,compression,bending and vibration was separately applied on the TBC specimens in the research. A combination of mechanical loadings with conditions of thermal fatigue,thermal shock or overheating was also used in this investigation. It is found that the damage behaviour of the TBC under these typical conditions can be grouped into 13 categories from the perspective of microstructure. These categories will play a significant role in understanding the failure behaviour of the TBC in complicated servicing environment.

关 键 词：热障涂层 典型条件 微观损伤行为 应力 氧化 裂纹 损伤形式 

分 类 号：V261.93[航空宇航科学与技术—航空宇航制造工程]