(1. 昆明理工大學(xué) 材料科學(xué)與工程學(xué)院，昆明 650093；
2. 中國人民解放軍軍事科學(xué)院 國防科技創(chuàng)新研究院，北京 100071)
摘 要: 超高溫、高隔熱、長壽命熱障涂層材料的研制已成為高溫?zé)岱雷o(hù)涂層領(lǐng)域的研究熱點。概述了常用熱障涂層材料和典型潛在熱障涂層材料的熱力學(xué)性能，綜述了其優(yōu)點和不足。此外，本工作研究了稀土鉭酸鹽RETaO4在1400 ℃時的抗CMAS腐蝕性能，同時利用交流阻抗儀測試YTaO4和YSZ在600~900 ℃的電導(dǎo)率，并研究了YTaO4涂層系統(tǒng)中熱生長氧化物(TGO)的生長速率。結(jié)果表明：與YSZ相比，RETaO4具有較強的抗CMAS腐蝕性能和較低的氧離子電導(dǎo)率，降低了黏結(jié)層的氧化速率和TGO的生長速率。最后，展望了TBC未來的發(fā)展方向：氧絕緣性和氧離子的傳輸機理、涂層結(jié)構(gòu)優(yōu)化、抗CMAS腐蝕和高溫相穩(wěn)定性。
關(guān)鍵字: 熱障涂層；熱力學(xué)性能；稀土鉭酸鹽；抗CMAS腐蝕；氧離子電導(dǎo)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
