热端部件热障涂层的氧化和热疲劳性能研究  

Study on Oxidation and Thermal Fatigue Properties of Thermal Barrier Coatings on Hot End Components

作　　者：于大千 宫骏[2] 孙建平 钱原吉 YU Da-qian;GONG Jun;SUN Jian-ping;QIAN Yuan-ji(School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Wuxi Research Institute of Applied Technologies Tsinghua University,Wuxi 214000,China;Wuxi Qianyi Turbine Technology Co.,Ltd,Wuxi 214000,China)

机构地区：[1]中国科学技术大学材料科学与工程学院,辽宁沈阳110016 [2]中国科学院金属研究所师昌绪先进材料创新中心,辽宁沈阳110016 [3]清华大学无锡应用技术研究院,江苏无锡214000 [4]无锡乾易动力技术有限公司,江苏无锡214000

出　　处：《材料保护》2022年第7期43-48,共6页Materials Protection

基　　金：江苏省产业前瞻与关键核心技术——竞争项目(BE2019020);国家重点研发计划“科技助力经济2020”重点专项资助。

摘　　要：为了更准确地界定热喷涂粘结层常用原料Amperit 415和Amperit 421的使用范围,采用热喷涂和真空热处理技术制备了2种热障涂层(陶瓷层相同,包含上述2种不同MCrAlY粉末制备的粘结层),其中前者Al、Cr含量相对较高,后者Al、Cr含量较低,但含有Re、Ta等难熔金属元素。针对2种涂层进行了静态空气下1000℃等温氧化实验和梯度热冲击实验,对比研究了2种涂层的抗高温氧化和抗热疲劳性能,包括粘结层在氧化中结构、成分的变化,氧化动力学曲线及其激活能,以及2种涂层的抗热冲击性能。结果表明:2种涂层的抗高温氧化和抗热疲劳性能基本相同,在低热腐蚀、低冲蚀环境下,可以互相替代用于热端部件.In order to define more accurately the application range of Amperit 415 and Amperit 421,which are commonly used raw materials for the thermal spray adhesive layer,two kinds of thermal barrier coatings(with the same ceramic layer and a different adhesive layer prepared respectively with the two differnt MCrAlY powders mentioned above)were prepared by thermal spraying and vacuum heat treatment.The adhe-sive layer of the former contained a relatively high contents of Al and Cr,while that of the latter contained a lower contents of Al and Cr as well as the refractory metals of Re and Ta.Subsequently,isothermal oxidation tests at 1000℃and gradient thermal shock tests were carried out for the two coatings.Additionally,the high-temperature oxidation resistance and thermal fatigue resistance of the two coatings were compared and studied,including the variation of the microstructure and composition of the adhesive layer with oxidation time,the oxidation kinetics curve and corresponding activation energy,and the thermal shock resistance of the two coatings.Results showed that the high-temperature oxidation resist-ance and thermal fatigue resistance of the two coatings were basically identical,so these two coatings could replace each other for the applica-tion in hot end parts under low-hot corrosion and low-erosion conditions.

关 键 词：MCRALY 热障涂层 热端部件 热喷涂 真空热处理 氧化动力学 激活能 热疲劳性能 

分 类 号：TG174.444[金属学及工艺—金属表面处理]