热障涂层材料体系研究现状及展望

Research status and Prospect of Thermal Barrier coating Materials system

随着先进航空发动机推进引擎向着高推动力和长服役寿命的方向发展,如今传统的含有6-8wt%的氧化钇稳定氧化锆(6-8YSZ)热障涂层材料体系,在服役温度1200℃以上时,YSZ陶瓷涂层会发生高温相变,产生涂层间的热应力,最终导致涂层剥落失效,因此新材料体系的引入和涂层结构的改进刻不容缓。本文介绍了传统YSZ的发展历史并且阐述了掺杂稀土氧化物稳定氧化锆、钙钛矿结构和稀土锆酸盐(A2Zr2O7)即烧绿石结构等陶瓷材料体系的研究进展和发展前景,并分析了新型氧化铪基体陶瓷热障涂层体系和高熵材料体系涂层研究现状和未来发展趋势,最后对新型热障涂层材料的问题和发展进行了总结和展望。

With the development of advanced aero-engine propulsion engine towards high propulsion and long service life,the traditional yttria stabilized zirconia(6-8YSZ)thermal barrier coating system containing 6-8wt.%yttria stabilized zirconia(6-zirconia)thermal barrier coating will undergo high temperature phase transformation when the service temperature is above 1200℃,resulting in thermal stress between coatings and spalling failure of the coating.Therefore,it is urgent to introduce the new material system and improve the coating structure.This paper introduces the development history of traditional YSZ and describes the research progress and development prospect of ceramic materials such as rare earth oxide stabilized zirconia,perovskite structure and rare earth zirconate(A2Zr2O7)pyrochlore structure,and analyzes the research status and future development trend of new hafnium oxide matrix ceramic thermal barrier coating system and high entropy material system coating.Finally,the problems and development of new thermal barrier coating materials are summarized and prospected.