摘要
MAX相Ti_(2)AlC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(Y_(2)O_(3)部分稳定ZrO_(2))热障涂层表面制备Ti_(2)AlC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,Ti_(2)AlC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~100μm的Ti_(2)AlC防护层,其与YSZ涂层之间的界面完整,结合良好,为MAX相Ti_(2)AlC用于CMAS防护层提供了指导。
Ti2 AlC MAX phase is a potential material protecting thermal barrier coatings(TBCs)against environmental deposition(CMAS)corrosion.Ti2 AlC protective layer was prepared on the surface of YSZ(Y2 O3 partially stabilized ZrO2)TBCs by a slurry 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 Ti2 AlC 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 temperature and time are 1250℃and 10 h,respectively.Finally,a Ti2 AlC protective coating with a thickness of~100μm is successfully 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 Ti2 AlC MAX phase protective coating for TBC applications.
作者
郭磊
李博文
冯佳燚
GUO Lei;LI Bowen;FENG Jiayi(College of Materials Science and Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Advanced Ceramics and Processing Technology of Ministry of Education,Tianjin University,Tianjin 300072,China;Tianjin Key Laboratory of Modern Connection Technology,Tianjin University,Tianjin 300072,China)
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2021年第1期16-24,共9页
China Surface Engineering
基金
国家自然科学基金资助项目(51971156)。
