MoSi_(2)改性YGYZ作为陶瓷面层的多层热障涂层体系的抗高温氧化性能研究  

High-temperature Performance of MoSi_(2)Modified YGYZ Thermal Barrier Coating

作　　者：宇波 李彰 周凯旋 田浩亮 房永超 张晓敏[2] 金国[2] YU Bo;LI Zhang;ZHOU Kaixuan;TIAN Haoliang;FANG Yongchao;ZHANG Xiaomin;JIN Guo(Aviation Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material,AECC Beijing Institution of Aeronautical Materials,Beijing 100095,China;Institute of Surface Science and Technology,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]中国航发北京航空材料研究院航空材料先进腐蚀与防护航空科技重点实验室,北京100095 [2]哈尔滨工程大学表界面科学与技术研究所,哈尔滨150001

出　　处：《中国腐蚀与防护学报》2023年第4期812-820,共9页Journal of Chinese Society For Corrosion and Protection

基　　金：国家重点研发计划(2121YFB3702004);国家自然科学基金(52075508)。

摘　　要：为了提高传统ZrO_(2)基陶瓷涂层在高温高压环境中的服役性能,本文基于由Y_(2)O_(3)/Gd_(2)O_(3)/Yb_(2)O_(3)共稳定的ZrO_(2)(YGYZ)面层、Eu_(2)O_(3)/Y_(2)O_(3)稳定ZrO_(2)中间层、NiCoCrAlYTa底层构成的复合热障涂层,设计制备了YGYZ面层内掺杂了不同含量(10%、20%和30%)MoSi_(2)自修复粒子的新型热障涂层。利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和X射线能谱仪(EDS)等表征涂层的微观和组织结构,借助箱式高温电阻炉测试涂层的抗高温氧化性能。研究结果表明:掺杂MoSi_(2)自修复粒子的涂层截面形貌呈层状结构,其相结构不会因MoSi_(2)掺杂量的变化而发生变化,均为t-ZrO_(2)和t-MoSi_(2)相。其中,MoSi_(2)含量为20%时,涂层在1100℃恒温氧化200 h后增重仅为3.7 mg/cm^(2),相较于MoSi_(2)含量为10%与30%涂层分别下降了5%与18%,抗高温氧化性能最佳。In order to improve the service performance of traditional zirconia-based ceramic coatings in high-temperature and high-pressure environment,the novel thermal barrier coatings based on Y_(2)O_(3)/Gd_(2)O_(3)/Yb_(2)O_(3)co-doped ZrO_(2)top layer(YGYZ),Y_(2)O_(3)/Eu_(2)O_(3)co-doped ZrO_(2)middle layer and NiCoCrAlYTa bonding layer were prepared,whose YGYZ top layers were doped with 10%,20%,and 30%MoSi_(2)selfhealing particles,respectively.Then their microstructure,chemical composition,phase constitution and isothermal oxidation resistance at 1100 oC in air were assessed by means of scanning electron microscope(SEM),X-ray diffractometer(XRD),X-ray energy dispersive spectrometer(EDS)and box muffle furnace.The results show that the cross-sectional morphologies of the coatings doped MoSi_(2)self-healing parti-cleswere layered structures,and their phase structures would not change with the variation of the doping amount of MoSi_(2),they were all composed of t-ZrO_(2)and t-MoSi_(2).Among them,the coating with a top layer doped 20%MoSi_(2)exhibited the best high temperature performance,whose weight gain was 3.7 mg/cm^(2)after 200 h constant temperature oxidation at 1100℃,which decreased by 5%and 18%,respectively,compared to coatings with 10%and 30%MoSi_(2).

关 键 词：热障涂层 自修复 等离子喷涂 抗氧化性能 

分 类 号：TG156.88[金属学及工艺—热处理]