铌合金表面热防护涂层研究进展

作为武器装备、航空航天等多种现代工业领域热端部件中应用十分广泛的结构材料,铌合金在高温富氧燃流的冲刷下会发生严重的烧蚀现象,进而影响了其在超高温环境下的使用性能。研究发现,采用表面涂层技术能够有效提升铌合金的高温抗烧蚀性能。因此结合热端部件富氧、超高温的实际服役环境,首先介绍了国内外铌合金表面抗氧化烧蚀涂层领域的研究现状,对比分析了金属基和硅系陶瓷抗烧蚀涂层各自在抗氧化烧蚀性能上的优缺点;然后综述了近年来国内外有关热障涂层的研究进展,归纳总结了ZrO2基陶瓷涂层、稀土锆酸盐陶瓷涂层以及钙钛矿结构陶瓷涂层三种热障涂层材料的特点;最后对铌合金表面热防护涂层的结构设计以及未来的研究方向进行了展望。

Progress in Research on Thermal Protective Coatings of Niobium-based Alloys

As a structural material widely used in the hot end of various modern industrial fields such as weaponry and aerospace, niobium-based alloys will suffer seriously ablation under the erosion of combustion flow, which will affect its performance in high-temperature environment. The study found that the use of surface coating technology can effectively improve the high temperature ablation resistance of niobium-based alloys. Based on the actual service environment of oxygen-rich and ultra-high temperature of hot end components, the research status of anti-oxidation ablation coatings at home and abroad was reviewed, and the merit and demerit of metal-based coating and silicon-based ceramic coating in terms of oxidation ablation resistance were compared. Then, the research progress of thermal barrier coatings at home and abroad in recent years was reviewed. The characteristics of three kinds of thermal barrier coatings, including ZrO2-based ceramic coating, rare earth zirconate ceramic coating and perovskite ceramic coating, were summarized. Finally, the structure design and future research direction of thermal protection coating on niobium-based alloys was prospected.