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Effects of pellet surface roughness and pre-oxidation temperature on CMAS corrosion behavior of Ti2AlC
Guo, Lei1,2; Li, Guang1; Wu, Jing3; Wang, Xiaohui4
Corresponding AuthorGuo, Lei(glei028@tju.edu.cn)
2022-06-01
Source PublicationJOURNAL OF ADVANCED CERAMICS
ISSN2226-4108
Volume11Issue:6Pages:945-960
AbstractCalcium-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.
Keywordthermal barrier coatings (TBCs) Ti2AlC surface roughness pre-oxidation temperature calcium-magnesium-alumina-silicate (CMAS) corrosion thermal cycling
Funding OrganizationNational Natural Science Foundation of China
DOI10.1007/s40145-022-0588-0
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51971156]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000793643800001
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173924
Collection中国科学院金属研究所
Corresponding AuthorGuo, Lei
Affiliation1.Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
2.Minist Educ, Key Lab Adv Ceram & Machining Technol, Tianjin Key Lab Adv Joining Technol, Tianjin 300072, Peoples R China
3.Shenyang Ligong Univ, Sch Mat Sci & Engn, Shenyang 110159, Peoples R China
4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Recommended Citation
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.
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