稀土硅酸盐环境障涂层耐水氧腐蚀研究进展-中国材料进展

文章信息/Info

Title:: Research Progress on Water Vapor Corrosion of Rare-Earth Silicates Environmental Barrier Coatings

Author(s):: ZHONG Xin; NIU Yaran; ZHENG Xuebin; DING Chuanxian; Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Keywords:: environmental barrier coatings; rare-earth silicates; water vapor corrosion resistance; corrosion mechanism

摘要:: 陶瓷基复合材料（ceramic matrix composites，CMCs）具有密度低、耐高温、抗氧化、力学性能优异等特点，可部分取代传统高温合金应用于新一代航空发动机的热端部件。但CMCs在服役过程中面临严苛的水氧腐蚀，这严重影响其性能稳定性。环境障涂层（environmental barrier coatings，EBCs）是应用于航空发动机热端部件的重要材料，可将腐蚀性介质与CMCs隔离开来，从而对基体进行有效保护。简要介绍了EBCs应用背景、选材要求、发展历程和制备工艺，重点叙述了稀土硅酸盐EBCs水氧腐蚀行为和机理的研究进展，并阐述了其服役过程中的失效原因。针对目前EBCs研究存在的问题提出了改进建议。期望本综述对高性能EBCs的开发提供一些参考。

Abstract:: Ceramic matrix composites (CMCs) have the characteristics of low density, high temperature resistance, oxidation resistance and excellent mechanical performance, which can partially replace superalloys and be used as hot-end components for aircraft engines. However, CMCs are confronted with corrosion from media such as water vapor during long-term service, which seriously affects their performance and stability. Environmental barrier coatings (EBCs) are important materials used in the hot-end components of aircraft engines, which can isolate corrosive media from CMCs and protect the substrate. The application background, materials selection requirements, development history, and preparation process of EBCs were briefly introduced, and the research progress of the water vapor corrosion behaviors and mechanisms of rareearth silicates EBCs were focused on. The failure reasons of rare-earth silicates EBCs during service were also elaborated. In response to the current problems of EBCs, improvement advices have been proposed, which have reference significance for the development of high-performance EBCs.