EB-PVD 稀土锆酸盐热障涂层研究进展

Research progress of rare earth zirconate thermal barrier coatings by EB-PVD

摘要

先进航空发动机技术的迭代升级对热障涂层的性能提出了更高要求，传统 YSZ 热障涂层体系已难以满足涡轮叶片的高温、复杂环境服役需求。稀土锆酸盐材料因具备稳定的高温相结构、低热导率、良好抗腐蚀性能等突出优势，成为最具潜力的下一代涡轮叶片热障涂层应用体系。本文系统总结了电子束物理气相沉积（EB-PVD）制备稀土锆酸盐热障涂层的研究进展，全面综述其制备特性、核心性能及失效行为机制，重点阐述了稀土锆酸盐材料的相结构、热导率、热膨胀系数及抗 CMAS 腐蚀等关键性能特点，深入分析了其多诱因耦合失效行为特征。最后，明确了稀土锆酸盐涂层偏析控制、超低热导与高热膨胀涂层设计的技术发展路径，并展望了其特定 CMAS 腐蚀机制及多因素关联失效行为模型的后续研究方向。

Abstract

The iterative upgrading of advanced aero-engine technology has put forward higher requirements for the performance of thermal barrier coatings (TBCs). The traditional yttria-stabilized zirconia (YSZ) TBCs system can no longer meet the high-temperature and complex environmental service requirements of turbine blades. Rare earth zirconate materials have become the most promising candidate system for the next-generation TBCs of turbine blades due to their outstanding advantages such as excellent high-temperature phase stability，low thermal conductivity and good corrosion resistance. This paper systematically summarizes the research progress of rare earth zirconate TBCs prepared by electron beam physical vapor deposition (EB-PVD)， comprehensively reviews their preparation characteristics， core properties and failure mechanism. It focuses on elaborating the key performance characteristics of rare earth zirconate materials， including phase structure， thermal conductivity， thermal expansion coefficient and resistance to calcium-magnesium-aluminosilicate (CMAS) corrosion， and deeply analyzes the characteristics of their multi-inducer coupled failure behavior. Finally， the technical development paths for segregation control of rare earth zirconate coatings， and the design of ultra-low thermal conductivity and high thermal expansion coatings are clarified，and the future research directions of their specific CMAS corrosion mechanism and multi-factor related failure behavior model are prospected.

关键词

热障涂层 / 电子束物理气相沉积 / 稀土锆酸盐 / 热导率 / 失效行为

Key words

thermal barrier coating / electron beam physical vapour deposition / rare earth zirconate / thermal conductivity / failure behavior

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