Effects of pellet surface roughness and pre-oxidation temperature on CMAS corrosion behavior of Ti2AlC

doi:10.1007/s40145-022-0588-0

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	Effects of pellet surface roughness and pre-oxidation temperature on CMAS corrosion behavior of Ti2AlC
	Guo, Lei 3,4; Li, Guang 4; Wu, Jing 2; Wang, Xiaohui 1
刊名	JOURNAL OF ADVANCED CERAMICS
	2022-06-01
卷号	11 期号:6 页码:945-960
关键词	thermal barrier coatings (TBCs) Ti2AlC surface roughness pre-oxidation temperature calcium-magnesium-alumina-silicate (CMAS) corrosion thermal cycling
ISSN号	2226-4108
DOI	10.1007/s40145-022-0588-0
通讯作者	Guo, Lei(glei028@tju.edu.cn)
英文摘要	Calcium-magnesium-alumina-silicate (CMAS) corrosion is a serious threat to thermal barrier coatings (TBCs). Ti2AlC has been proven to be a potential protection layer material for TBCs to resist CMAS corrosion. In this study, the effects of the pellet surface roughness and temperature on the microstructure of the pre-oxidation layer and CMAS corrosion behavior of Ti2AlC were investigated. The results revealed that pre-oxidation produced inner Al2O3 layer and outer TiO2 clusters on the pellet surfaces. The content of TiO2 decreased with decreasing pellet surface roughness and increased along with the pre-oxidation temperature. The thickness of Al2O3 layer is also positively related to the pre-oxidation temperature. The Ti2AlC pellets pre-oxidized at 1050 degrees C could effectively resist CMAS corrosion by promoting the crystallization of anorthite (CaAl2Si2O8) from the CMAS melt rapidly, and the resistance effectiveness increased with the pellet surface roughness. Additionally, the CMAS layer mainly spalled off at the interface of CaAl2Si2O8/Al2O3 layer after thermal cycling tests coupled with CMAS corrosion. The Al2O3 layer grown on the rough interface could combine with the pellets tightly during thermal cycling tests, which was attributed to obstruction of the rough interface to crack propagation.
资助项目	National Natural Science Foundation of China[51971156]
WOS研究方向	Materials Science
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000793643800001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173923]
专题	金属研究所_中国科学院金属研究所
通讯作者	Guo, Lei
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Shenyang Ligong Univ, Sch Mat Sci & Engn, Shenyang 110159, Peoples R China 3.Minist Educ, Key Lab Adv Ceram & Machining Technol, Tianjin Key Lab Adv Joining Technol, Tianjin 300072, Peoples R China 4.Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
推荐引用方式 GB/T 7714	Guo, Lei,Li, Guang,Wu, Jing,et al. Effects of pellet surface roughness and pre-oxidation temperature on CMAS corrosion behavior of Ti2AlC[J]. JOURNAL OF ADVANCED CERAMICS,2022,11(6):945-960.
APA	Guo, Lei,Li, Guang,Wu, Jing,&Wang, Xiaohui.(2022).Effects of pellet surface roughness and pre-oxidation temperature on CMAS corrosion behavior of Ti2AlC.JOURNAL OF ADVANCED CERAMICS,11(6),945-960.
MLA	Guo, Lei,et al."Effects of pellet surface roughness and pre-oxidation temperature on CMAS corrosion behavior of Ti2AlC".JOURNAL OF ADVANCED CERAMICS 11.6(2022):945-960.