陶瓷基复合材料表面环境障涂层材料研究进展-中国材料进展

文章信息/Info

Title:: Research Progress on Environmental Barrier Coatings Materials for Ceramic Matrix Composites

作者:: 赵春玲1; 杨博2; 李阔1; 李广荣2; 赵宇1; 邸士雄1; 李璞1; 杨冠军2; （1. 中国航发湖南动力机械研究所，湖南株洲 412002）（2. 西安交通大学金属材料强度国家重点实验室，陕西西安 710049）

Author(s):: ZHAO Chunling1; YANG Bo2; LI Kuo1; LI Guangrong2; ZHAO Yu1; DI Shixiong1; LI Pu1; YANG Guanjun2; （1. Hunan Power Machinery Research Institute, Aero Engine Corporation of China, Zhuzhou 412002, China）（2. State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong University, Xian 710049, China）

Keywords:: environmental barrier coatings; SiCf/SiC composites; water vapor corrosion mechanism; water vapor corrosion resistance

摘要:: 随着新一代航空发动机推重比的不断提升，其内部燃气温度已经远远超过传统高温合金的承温极限，因此亟待研发新材料来满足先进航空发动机的发展需求。SiCf/SiC陶瓷基复合材料具有优异的高温力学性能和高温抗氧化性能，且其密度较低，是下一代高性能航空发动机热端部件的理想结构材料。但是，SiCf/SiC材料在实际服役环境中同样面临着严重的氧化腐蚀问题，因此需要使用能够阻隔水氧介质的环境障涂层（EBCs）来提高SiCf/SiC材料的耐腐蚀性能，进而延长航空发动机热端部件的服役寿命。在阐明SiCf/SiC材料水氧腐蚀机制的基础上，进一步总结了EBCs的设计原则和发展历程，并重点比较了各种涂层材料体系的优缺点及性能差异，为未来先进航空发动机陶瓷基复合材料热端部件用EBCs材料的研制提供借鉴。

Abstract:: With the development of advanced aero-engine, the continuous increasement of thrust-weight ratio results in much higher working temperatures, which is more than the temperature limitation of traditional superalloys. Therefore, it is urgent to develop new materials to replace superalloys. Owing to the excellent high-temperature mechanical performance, high-temperature oxidation resistance and low density, SiCf/SiC ceramic matrix composite is regarded as an ideal candidate for structural materials applied in next-generation aero-engine. However, SiCf/SiC materials also faces serious problems of oxidation corrosion in actual service environment. In order to improve the corrosion resistance of SiCf/SiC materials, it is necessary to prepare environmental barrier coatings (EBCs) on its surface to prevent water and oxygen medium, so as to prolong the service lifetime of hot-sections in aero-engine. The water vapor corrosion mechanism of SiCf/SiC materials was summarized in this paper. Subsequently, the design principles and development progress of EBCs were reviewed. Moreover, advantages and disadvantages of different EBCs materials were compared. All these would provide a fundamental reference for the development of EBCs materials in future application of aero-engine.