(1. 昆明理工大学 材料科学与工程学院，昆明 650093；
2. 中国人民解放军军事科学院 国防科技创新研究院，北京 100071)
摘 要: 超高温、高隔热、长寿命热障涂层材料的研制已成为高温热防护涂层领域的研究热点。概述了常用热障涂层材料和典型潜在热障涂层材料的热力学性能，综述了其优点和不足。此外，本工作研究了稀土钽酸盐RETaO4在1400 ℃时的抗CMAS腐蚀性能，同时利用交流阻抗仪测试YTaO4和YSZ在600~900 ℃的电导率，并研究了YTaO4涂层系统中热生长氧化物(TGO)的生长速率。结果表明：与YSZ相比，RETaO4具有较强的抗CMAS腐蚀性能和较低的氧离子电导率，降低了黏结层的氧化速率和TGO的生长速率。最后，展望了TBC未来的发展方向：氧绝缘性和氧离子的传输机理、涂层结构优化、抗CMAS腐蚀和高温相稳定性。
关键字: 热障涂层；热力学性能；稀土钽酸盐；抗CMAS腐蚀；氧离子电导率
（1. Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. National Innovation Institute of Defense Technology, Chinese People''s Liberation Army Academy of Military Sciences, Beijing 100071, China）
Abstract:The development of ultra-high temperature, high thermal insulation and long-life thermal barrier coatings (TBC) has become a research hotspot in the field of high temperature thermal protective coatings. The thermo-physical properties of both traditional and potential thermal barrier coating materials were summarized, their advantages and disadvantages were reviewed. In addition, in this work, the anti-CMAS corrosion properties of rare earth tantalate RETaO4 at 1400 ℃ were investigated, and the oxygen ion conductivity of YTaO4 and YSZ at 600-900 ℃ was measured by AC impedance spectroscopy, and the growth rate of TGO in the YTaO4 coating system was investigated. The results show that RETaO4 has strong corrosion resistance to CMAS, YTaO4 has lower oxygen ion conductivity than that of YSZ, which reduces the oxidation rate of the bonding layer and the growth rate of TGO. Finally, the future directions of TBC development were prospected, such as oxygen insulation and oxygen ion transport mechanism, coating structure optimization, CMAS corrosion resistance and high temperature phase stability.
Key words: thermal barrier coating; thermo-physical properties; rare earth tantalate; anti-CMAS corrosion; oxygen ion conductivity
