| 摘要: |
| 环境障涂层因具有良好的抗高温水氧腐蚀能力而备受关注,但是由于外部砂粒等对涂层表面的侵蚀作用,仅能满足抗水氧腐蚀,还不能达到未来航空器高温部端的要求,CMAS 腐蚀是对环境障涂层的另一个挑战。 环境障涂层多采用等离子体喷涂工艺制备。 由于涂层在经历高低温冲击时,会不可避免地发生失效。 针对这一事实,文中对涂层失效种类和失效方式进行了总结和归纳,同时还介绍了环境障涂层的产生和发展历程。 从微观、介观到宏观的维度介绍了环境障涂层的选材;通过分析国内外在环境障涂层方面的研究结果,结合计算模拟对 CMAS 引起的失效、高温水蒸气引起的失效以及热冲击引起的失效,进行了详细的阐述并总结了相应的失效机理;最后指出了环境障涂层面向应用仍然需要解决的问题以及未来的研究趋势。 |
| 关键词: 环境障涂层 CMAS 高温水氧腐蚀 热冲击 失效机理 |
| DOI：10.11933/j.issn.1007-9289.20190812001 |
| 分类号:TG174 |
| 文章编号:1007-9289(2020)03-0033-17 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51671208, 91960107)； NSAF 联合基金(U1730139)； 上海市自然科学基金(19ZR1479600) |
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| Research Progress of High Temperature Failure of Plasma Sprayed Environmental Barrier Coatings |
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Zhuang Mingxiang1,2, Du Yeyuan1, Yuan Jianhui1, Wang Liang2
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1.School of Material Engineering, Shanghai University of Engineering Science, Shanghai 201620 , China;2.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899 , China
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| Abstract: |
| Environmental barrier coatings (EBCs) have attracted much attention due to its excellent resistance to high temper- ature water and oxygen corrosion. However, due to the surface coating corroded by external sand particles, commercial EBCs can not meet the requirements of the hot-section components of the aircraft in the future. CMAS corrosion is another challenge to EBCs. Nowadays, EBCs are mostly prepared by plasma spraying. As the coatings were endured with thermal shock conditions, failure will inevitably occur. In response to this fact, the types of failures and failure modes were summarized, and the process of generation and development of EBCs were also introduced. In this paper, the selection of EBCs was introduced from micro, me- soscopic and macroscopic scale. By analyzing the experimental investigation results of EBCs at home and abroad, combining with modeling and simulation results, the failure mechanism of EBCs induced by CMAS erosion, high temperature water vapor and thermal shock was summarized. Finally, the problems that still need to be solved for the EBCs application and the research trends in the future were also pointed out. |
| Key words: environmental barrier coatings CMAS high temperature water oxygen corrosion thermal shock failure mecha- nism |
