IMR OpenIR
Ti2AlC MAX phase for resistance against CMAS attack to thermal barrier coatings
Guo, Lei; Yan, Zheng; Wang, Xiaohui; He, Quanjun
2019-04-15
Source PublicationCERAMICS INTERNATIONAL
ISSN0272-8842
Volume45Issue:6Pages:7627-7634
AbstractTo 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.
KeywordThermal barrier coatings (TBCs) Calcium-magnesium-alumina-silicate (CMAS) MAX phases Ti2AlC Protective layers
Indexed BySCI
Language英语
WOS IDWOS:000460492200130
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81183
Collection中国科学院金属研究所
Recommended Citation
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.
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