稀土掺杂热障涂层体系及其荧光效应研究现状与发展趋势  

Research Status and Development Trend of Rare Earth Doped Thermal Barrier Coating System and Its Fluorescence Effect

作　　者：刘延宽 李鑫林 王志平 LIU Yankuan;LI Xinlin;WANG Zhiping(Tianjin Key Laboratory of Civil Aircraft Airworthiness and Maintenance,College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院天津市民用航空器适航与维修重点实验室,天津300300

出　　处：《表面技术》2024年第14期15-31,共17页Surface Technology

基　　金：中央高校基本科研业务费中国民航大学培育专项(3122023PY10)。

摘　　要：稀土掺杂热障涂层是指将稀土元素掺杂到热障涂层(ThermalBarrierCoatings,TBCs)陶瓷面层中,不仅可以在一定程度上改善热障涂层的隔热性能和力学性能,还可以赋予其荧光特性,利用其荧光特性可以实现温度测量、热历史追踪、无损检测等方面的应用,从而达到寿命预测的目的。重点围绕国内外稀土荧光效应在热障涂层中的研究和发展趋势进行了系统阐述,分别介绍了稀土掺杂热障涂层的结构以及荧光效应在时间效应和强度效应上的检测原理,分析了热障涂层稀土掺杂原理及其制备工艺,讨论了稀土元素的掺杂对热障涂层热力学性能以及抗CMAS(CaO、MgO、Al_(2)O_(3)、SiO_(2))腐蚀性的影响,阐述并分析了基于稀土荧光效应的热障涂层在荧光测温、热历史传感器和无损检测等方面的研究和应用,为后续基于稀土荧光效应的热障涂层研究和应用奠定了理论基础,最后对基于稀土荧光效应的热障涂层今后需要解决的问题和发展方向进行了展望。Traditional thermal barrier coatings(TBCs)typically consist of a high-temperature structural material substrate,an intermediate metallic bond coat and a ceramic top coat.Rare earth doped thermal barrier coatings refer to coatings doped with rare earth elements into the ceramic surface layer.This can improve the performance of TBCs to a certain extent and give them fluorescence characteristics to obtain a specific function.The work aims to provide a brief summary on the recent research and development trends of the rare earth fluorescence effect in TBCs.Firstly,the structure of rare earth doped TBCs was introduced,followed by an explanation of the detection principle of fluorescence effect in terms of lifetime and intensity.The effect of rare earth doping on the intrinsic properties of TBCs was discussed.The impact on thermodynamic properties and corrosion resistance to melting CMAS(CaO,MgO,Al_(2)O_(3),SiO_(2))was elaborated.Additionally,the research and application of rare earth fluorescence-based TBCs in fluorescence temperature measurement,thermal history sensor and non-destructive testing were explored.Finally,the problems to be addressed and the development direction of rare earth fluorescence-based TBCs were prospected.From the introduction and description of rare earth doped TBCs system,the principle of the fluorescence effect of rare earth doped TBCs is discussed.The two main fluorescence effects of rare earth elements,which are lifetime effect and intensity effect,are described in detail.In addition to different fluorescence effects,different structures of rare earth doped TBCs systems will also lead to different fluorescence properties and application purposes.Lanthanide trivalent ions,which are sometimes rare earth elements,can be doped uniformly into the entire ceramic surface layer.This can indicate the temperature of the surface coating and detect the coating degradation caused by physical erosion,chemical corrosion or phase transition.Placing the doping layer at the bottom of the ceramic layer allow

关 键 词：热障涂层 稀土掺杂 荧光测温 热历史传感器 无损检测 

分 类 号：TG148[一般工业技术—材料科学与工程]