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Preparation and properties of CMAS resistant bixbyite structured high-entropy oxides RE2O3 (RE = Sm, Eu, Er, Lu, Y, and Yb): Promising environmental barrier coating materials for Al2O3f/Al2O3 composites
Sun, Yanan1,2; Xiang, Huimin2; Dai, Fu-Zhi2; Wang, Xiaohui3; Xing, Yan4; Zhao, Xiaojun1; Zhou, Yanchun2
Corresponding AuthorZhao, Xiaojun(Zhaoxj@csu.edu.cn) ; Zhou, Yanchun(yczhou@alum.imr.ac.cn)
2021-03-01
Source PublicationJOURNAL OF ADVANCED CERAMICS
ISSN2226-4108
Pages18
AbstractY2O3 is regarded as one of the potential environmental barrier coating (EBC) materials for Al2O3f/Al2O3 ceramic matrix composites owing to its high melting point and close thermal expansion coefficient to Al2O3. However, the relatively high thermal conductivity and unsatisfactory calcium-magnesium-aluminosilicate (CMAS) resistance are the main obstacles for the practical application of Y2O3. In order to reduce the thermal conductivity and increase the CMAS resistance, four cubic bixbyite structured high-entropy oxides RE2O3, including (Eu0.2Er0.2Lu0.2Y0.2Yb0.2)(2)O-3, (Sm0.2Er0.2Lu0.2Y0.2Yb0.2)(2)O-3, (Sm0.2Eu0.2Er0.2Y0.2Yb0.2)(2)O-3, and (Sm0.2Eu0.2Lu0.2Y0.2Yb0.2)(2)O-3 were designed and synthesized, among which (Eu0.2Er0.2Lu0.2Y0.2Yb0.2)(2)O-3 and (Sm0.2Er0.2Lu0.2Y0.2Yb0.2)(2)O-3 bulks were prepared by spark plasma sintering (SPS) to investigate their mechanical and thermal properties as well as CMAS resistance. The mechanical properties of (Eu0.2Er0.2Lu0.2Y0.2Yb0.2)(2)O-3 and (Sm0.2Er0.2Lu0.2Y0.2Yb0.2)(2)O-3 are close to those of Y2O3 but become more brittle than Y2O3. The thermal conductivities of (Eu0.2Er0.2Lu0.2Y0.2Yb0.2)(2)O-3 and (Sm0.2Er0.2Lu0.2Y0.2Yb0.2)(2)O-3 (5.1 and 4.6 W center dot m(-1)center dot K-1) are only 23.8% and 21.5% respectively of that of Y2O3 (21.4 W center dot m(-1)center dot K-1), while their thermal expansion coefficients are close to those of Y2O3 and Al2O3. Most importantly, HE RE2O3 ceramics exhibit good CMAS resistance. After being attacked by CMAS at 1350 degrees C for 4 h, the HE RE2O3 ceramics maintain their original morphologies without forming pores or cracks, making them promising as EBC materials for Al2O3f/Al2O3 composites.
Keywordhigh-entropy ceramics rare earth oxides low thermal conductivity thermal expansion coefficient CMAS resistance
Funding OrganizationNational Natural Science Foundation of China
DOI10.1007/s40145-021-0461-6
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51972089] ; National Natural Science Foundation of China[51672064] ; National Natural Science Foundation of China[U1637210]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000623120900001
PublisherSPRINGER
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161038
Collection中国科学院金属研究所
Corresponding AuthorZhao, Xiaojun; Zhou, Yanchun
Affiliation1.Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
2.Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China
3.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
4.Nanjing Univ Posts & Telecommun, New Energy Technol Engn Lab Jiangsu Prov, Nanjing 210023, Peoples R China
Recommended Citation
GB/T 7714
Sun, Yanan,Xiang, Huimin,Dai, Fu-Zhi,et al. Preparation and properties of CMAS resistant bixbyite structured high-entropy oxides RE2O3 (RE = Sm, Eu, Er, Lu, Y, and Yb): Promising environmental barrier coating materials for Al2O3f/Al2O3 composites[J]. JOURNAL OF ADVANCED CERAMICS,2021:18.
APA Sun, Yanan.,Xiang, Huimin.,Dai, Fu-Zhi.,Wang, Xiaohui.,Xing, Yan.,...&Zhou, Yanchun.(2021).Preparation and properties of CMAS resistant bixbyite structured high-entropy oxides RE2O3 (RE = Sm, Eu, Er, Lu, Y, and Yb): Promising environmental barrier coating materials for Al2O3f/Al2O3 composites.JOURNAL OF ADVANCED CERAMICS,18.
MLA Sun, Yanan,et al."Preparation and properties of CMAS resistant bixbyite structured high-entropy oxides RE2O3 (RE = Sm, Eu, Er, Lu, Y, and Yb): Promising environmental barrier coating materials for Al2O3f/Al2O3 composites".JOURNAL OF ADVANCED CERAMICS (2021):18.
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