摘要
热障涂层是广泛应用在航空发动机和燃气轮机热端部件表面的隔热功能涂层,能够显著提高发动机的工作效率和服役寿命。然而,在服役过程中,热障涂层通常会在界面或近界面区域发生横向裂纹的萌生、扩展及合并,最终导致涂层失效。因此,提升界面及近界面区域的稳定性是延长热障涂层寿命的关键。本文系统性地综述了当前应用于热障涂层界面/表面的处理技术,涵盖喷砂、激光方法构筑界面三维结构以及激光表面重熔等方法。同时,深入分析了界面结构对氧化物生长、界面裂纹萌生与扩展,以及对热障涂层寿命的影响规律,并进行归纳和总结了相关研究成果。这些研究对热障涂层界面结构设计及寿命优化具有重要的指导意义。
Thermal barrier coatings(TBCs)are widely applied on the hot sections of aero engines and gas turbines to provide thermal insulation and,thereby,enhancing efficiency and prolonging lifetime of the turbines.During operation,TBC failure typically occurs near the interface between the top coat and bond coat,following a sequence of crack nucleation,propagation and coalescence.Thus,improving the stability of the interface(or the ceramic near the interface)is critical for the long-term performance of TBCs.This paper reviewed strategies applied to optimize the interfacial(surface)microstructure of TBCs,including grit blasting,3D patterning,and surface remelting.The effect of the interfacial microstructure on the TGO oxidation,crack nucleation and propagation,and the lifetime of the TBCs were also discussed and summarized.This review provided valuable insights into interfacial microstructure design and lifetime optimization of TBCs.
作者
罗丽荣
陆杰
蔡黄越
赵晓峰
LUO Lirong;LU Jie;CAI Huangyue;ZHAO Xiaofeng(School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《热喷涂技术》
2025年第1期34-46,共13页
Thermal Spray Technology
基金
国家自然科学基金资助项目(52101101)
上海交通大学“新进青年教师启动计划”资助项目。
关键词
热障涂层
界面结构
喷砂
表面重熔
3D结构
裂纹扩展
thermal barrier coatings
interfacial microstructure
grit blasting
surface remelting
3D patterns
crack propagation
