新一代超高温热障涂层研究

New Generation Thermal Barrier Coatings for Ultrahigh Temperature Applications

介绍先进燃气涡轮发动机热障涂层的研究背景、意义和现状;综述近年来国内外在新一代超高温热障涂层方面的研究进展,包括新型超高温、高隔热陶瓷隔热层材料,1150℃以上抗高温氧化、与先进单晶高温合金化学匹配的新型金属黏结层材料,长寿命、高可靠性热障涂层结构设计以及先进热障涂层制备技术;分析发动机环境下CMAS沉积物对热障涂层的损伤机理以及相关的CMAS防护方法;最后展望新一代超高温热障涂层的发展动向及研究热点。

The research background, significance and current status of thermal barrier coatings （TBCs） for advanced gas turbine en- gines were highlighted. Research progress in new generation TBCs for ultra-high temperature applications was reviewed, which involved new ceramic topcoat materials with excellent high-temperature capability and thermal barrier performance, new metallic bond coat mate- rials with good oxidation resistance at temperatures above 1150~C and chemical compatibility with the underlying advanced single crystal superalloys, design of novel TBC structure architecture with superior durability, and advanced manufacturing technologies of TBCs. The effects of the deposit under engine environment comprising calcium, magnesium, aluminum and silicon （CMAS） on the TBCs lifetime were discussed. Also, the approaches to mitigate CMAS attack of TBCs were summarized. Eventually, the prospective trends and hot research topics of new generation TBCs for uhra-high temperature applications were forecast.