Sm2Zr2O7基热障涂层材料研究现状

由于航空发动机不断向高效率、高推重比方向发展,发动机热端部件表面热障涂层的服役条件也越来越苛刻。稀土锆酸盐作为新型热障涂层材料,其开发和应用受到越来越多国内外学者的关注。Sm₂Zr₂O₇材料在一系列稀土锆酸盐中具有烧绿石结构稳定、低热导率和高热膨胀系数等优点,具有良好的应用前景。为满足热障涂层更高的服役要求,Sm₂Zr₂O₇的掺杂改性及性能研究也成为了研究热点。首先,对热障涂层材料进行了简要概述,然后就Sm₂Zr₂O₇基陶瓷材料及其涂层的晶体结构、热物理性能、力学性能以及抗腐蚀性能等的研究进展进行了详细的介绍,为该材料在热障涂层领域的研究及应用提供参考。

Research Status of Sm2Zr2O7 Thermal Barrier Coatings

As the continuous development of aero–engine towards high fuel efficiency and high thrust weight ratio,the service conditions of thermal barrier coating on the surface of engine hot-section components are becoming more and more stringent.As a new type of thermal barrier coating material,the development and application of rare earth zirconate have attracted more and more attention from scholars at home and abroad.In a series of rare earth zirconates,Sm₂Zr₂O₇ has the advantages of stable pyrochlore structure,low thermal conductivity and high coefficient of thermal expansion.In order to meet the higher service requirements of thermal barrier coatings,the doping modification and performance evaluation of Sm₂Zr₂O₇ have increasingly become an important research hotspot.Firstly,this paper briefly summarizes the thermal barrier coating materials,and then Sm₂Zr₂O₇ based ceramic materials and its corresponding coatings are investigated from the views of crystal structure,thermophysical properties,mechanical properties and corrosion resistance in detail.And the results could provide a reference for the research and application of Sm₂Zr₂O₇ in the field of advanced thermal barrier coatings.