Ti2AlC MAX phase for resistance against CMAS attack to thermal barrier coatings

doi:10.1016/j.ceramint.2019.01.059

IMR OpenIR

	Ti2AlC MAX phase for resistance against CMAS attack to thermal barrier coatings
	Guo, Lei 1,2; Yan, Zheng 1; Wang, Xiaohui 3; He, Quanjun 1
通讯作者	Guo, Lei(glei028@tju.edu.cn)
	2019-04-15
发表期刊	CERAMICS INTERNATIONAL
ISSN	0272-8842
卷号	45 期号:6 页码:7627-7634
摘要	To protect thermal barrier coatings (TBCs) from calcium-magnesium-alumina-silicate (CMAS) attack, depositing a protective layer has been a promising approach. In this study, a MAX phase compound, Ti2AlC, is found to highly resist to CMAS attack, which could be a candidate material for the protective layer. The interaction between Ti2AlC pellets and molten CMAS at 1250 degrees C for 0.5 h, 2 h and 8 h was investigated. Exposed to CMAS melt for 0.5 h, a dense Al2O3 film formed on the surface, accompanied by Al and Ti migrating to the melt. The accumulation of Al and Ti in CMAS triggered its crystallization, forming anorthite and melilite phases. The Al2O3 film and the crystallization of the melt significantly suppressed the CMAS penetration. The film and crystals grew with the heat time. By comparison, some pre-oxidized Ti2AlC pellets were also exposed to CMAS attack at 1250 degrees C. The CMAS on the pre-oxidized pellets only precipitated CaAl2Si2O8 anorthite crystals, which exhibited much lower sizes than those in the non-oxidized samples. Also, the pre-oxidized pellets were highly resistant to CMAS penetration.
关键词	Thermal barrier coatings (TBCs) Calcium-magnesium-alumina-silicate (CMAS) MAX phases Ti2AlC Protective layers
资助者	National Natural Science Foundation of China ; Natural Science Foundation of Tianjin
DOI	10.1016/j.ceramint.2019.01.059
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51501127] ; Natural Science Foundation of Tianjin[16JCQNJC02900] ; Natural Science Foundation of Tianjin[16JCYBJC18700]
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics
WOS记录号	WOS:000460492200130
出版者	ELSEVIER SCI LTD
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/132269
专题	中国科学院金属研究所
通讯作者	Guo, Lei
作者单位	1.Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China 2.Minist Educ, Tianjin Key Lab Adv Joining Technol, Key Lab Adv Ceram & Machining Technol, Tianjin 300072, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Guo, Lei,Yan, Zheng,Wang, Xiaohui,et al. Ti2AlC MAX phase for resistance against CMAS attack to thermal barrier coatings[J]. CERAMICS INTERNATIONAL,2019,45(6):7627-7634.
APA	Guo, Lei,Yan, Zheng,Wang, Xiaohui,&He, Quanjun.(2019).Ti2AlC MAX phase for resistance against CMAS attack to thermal barrier coatings.CERAMICS INTERNATIONAL,45(6),7627-7634.
MLA	Guo, Lei,et al."Ti2AlC MAX phase for resistance against CMAS attack to thermal barrier coatings".CERAMICS INTERNATIONAL 45.6(2019):7627-7634.