摘要
热障涂层(TBCs)技术是降低燃气轮机热端部件表面温度、防止高温腐蚀、实现更高推重比的有效途径,但如果涂层失效,将会影响航空发动机使用的安全性。本文首先介绍了TBCs的成分结构,其次总结了冲蚀与外物损伤、烧结氧化、腐蚀三种常见的热障涂层破坏形式,然后阐述了国内外现阶段对破损或失效涂层的修复及再制造方法,最后针对如何抑制裂纹形成和扩展,提高热障涂层可靠性的问题进行了展望。
Thermal barrier coatings(TBCs)technology is an effective means for gas turbines to reduce the surface temperature of hot-end components,resist the hot corrosion,and obtain the high thrust-weight ratio.If the coating fails,it will influence the safety of aero-engine usage.In this paper,the composition and structure of TBCs are firstly introduced.Secondly three common thermal barrier coatings failure modes including erosion and foreign object damage,sintering oxidation and corrosion are summarized.And then the repair and remanufacturing methods of damaged and failed coatings at home and abroad are elaborated.Finally the prospect of how to inhibit the crack formation and propagation and improve the reliability of TBCs is carried out.
作者
陈举
苏倩
耿永祥
郑海忠
李贵发
杨楠
CHEN Ju;SU Qian;GENG Yongxiang;ZHENG Haizhong;LI Guifa;YANG Nan(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《航空工程进展》
CSCD
2021年第4期25-35,共11页
Advances in Aeronautical Science and Engineering
基金
国家自然科学基金(52071172,51361026)
江西省重点研发计划(20203BBE53046)。
关键词
热障涂层
失效行为
高温防护
涂层修复
再制造
thermal barrier coatings
failure behavior
high temperature protection
coating repair
remanufacturing
