引用本文:郭磊,李博文,冯佳燚.YSZ热障涂层表面MAX相Ti2AlC防护层的料浆法制备∗[J].中国表面工程,2021,34(1):16~24
Guo Lei,Li Bowen,Feng Jiayi.Preparation of Ti2 AlC MAX Phase Protective Coating on YSZ Thermal Barrier Coatings by Slurry Method[J].China Surface Engineering,2021,34(1):16~24
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YSZ热障涂层表面MAX相Ti2AlC防护层的料浆法制备∗
郭磊1,2,3, 李博文1, 冯佳燚1
1.天津大学材料科学与工程学院 天津 300072;2.天津大学先进陶瓷与加工技术教育部重点实验室 天津 300072;3.天津大学天津市现代连接技术重点实验室 天津 300072
摘要:
MAX 相 Ti2AlC 是一种很有潜力的热障涂层抗环境沉积物(CMAS)腐蚀防护层材料。 采用料浆法在 YSZ(Y2O3 部分稳定 ZrO2 )热障涂层表面制备 Ti22AlC 防护层,研究粘结剂种类、粘结剂含量、涂覆方式、保温时间和烧结温度对涂层结合质量的影响。 结果表明,与硅酸钠相比,乙基纤维素作为粘结剂更合适,当粘结剂含量为 7%左右时,Ti2AlC 涂层表面完整,无明显缺陷;与刷涂方法相比,采用浸渍的涂覆方式得到的涂层致密性良好,界面处无明显缝隙;最佳的烧结温度和保温时间为 1250 ℃ ,10 h。 最终采用优化出的参数在 YSZ 热障涂层表面制备出了厚度~100 μm 的 Ti2AlC 防护层,其与 YSZ 涂层之间的界面完整,结合良好,为 MAX 相 Ti2AlC 用于 CMAS 防护层提供了指导。
关键词:  MAX 相  Ti2AlC  热障涂层  CMAS  料浆法
DOI：10.11933/j.issn.1007-9289.20201227001
分类号:TG156;TB114
基金项目:国家自然科学基金资助项目(51971156)
Preparation of Ti2 AlC MAX Phase Protective Coating on YSZ Thermal Barrier Coatings by Slurry Method
Guo Lei1,2,3, Li Bowen1, Feng Jiayi1
1.College of Materials Science and Engineering, Tianjin University, Tianjin 300072 , China;2.Key Laboratory of Advanced Ceramics and Processing Technology of Ministry of Education, Tianjin University, Tianjin 300072 , China;3.Tianjin Key Laboratory of Modern Connection Technology, Tianjin University, Tianjin 300072 , China
Abstract:
Ti2AlC MAX phase is a potential material protecting thermal barrier coatings ( TBCs) against environmental deposition ( CMAS) corrosion. Ti2AlC protective layer was prepared on the surface of YSZ (Y2O3 partially stabilized ZrO2 ) TBCs by a slur- ry method, and effects of the binder type, binder content, covering method, sintering temperature and time on the coating quality are investigated. The results show that compared with sodium silicate, ethyl cellulose is more suitable as the binder. When the binder content was about 7%, the surface of Ti2AlC coating is entire without obvious defects. Compared with the brush covering method, the coating prepared by dipping had better compactness and no obvious gap at the interface. The optimum sintering tem- perature and time are 1250 ℃ and 10 h, respectively. Finally, a Ti2AlC protective coating with a thickness of~ 100 μm is suc- cessfully prepared on the surface of YSZ TBCs by the optimized parameters, the interface between which and the YSZ coating is entire and well combined. This study is considered to provide a guidance for using Ti2AlC MAX phase protective coating for TBC applications.
Key words:  MAX phase  Ti2AlC  thermal barrier coating  CMAS  slurry method
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