热障涂层的CMAS腐蚀失效及对策研究综述

The failure mechanism and countermeasure study of thermal barrier coatings after infiltration of CMAS deposits

摘要:

研制具有长寿命、高性能的热障涂层（TBCs），是制造我国大功率航空发动机、发展新一代超音速战机的一项十分紧迫的任务。由于外来沉积物CaO-MgO-Al2O3-SiO2（CMAS）渗入涂层而导致TBCs失效的现象越来越受到人们的重视，在过去的一段时间里，很多学者对CMAS渗入后涂层的失效机理进行了大量的研究并尝试了一些缓解CMAS渗入涂层的方法。本文针对当前应用最为广泛的“层状多孔结构”的等离子喷涂涂层及“细长柱晶结构”的电子束辅助物理气相沉积涂层，系统地梳理了近年来国内外学者对TBCs在CMAS渗入条件下的失效机制及涂层缓解CMAS渗入方面的最新研究成果，为制备高性能的TBCs提供帮助。

Abstract:

The development of long-lifetime and high-performance thermal barrier coatings (TBCs) has been a very urgent task for China due to the need of high-power aero-engines and new-generation supersonic air craft. The failure caused by the penetration of CaO-MgO-Al2O3-SiO2 (CMAS) has been given more and more attention during recent years. This paper reviewed the latest experimental results on the failure mechanism and corrosion resistance of coatings deposited by atmospheric plasma spraying (APS) or electron beam physical vapor deposition (EBPVD) with the aim of fabricating the high-performance TBCs.