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

doi:10.1007/s40145-021-0461-6

IMR OpenIR

	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, Yanan 1,2; Xiang, Huimin 2; Dai, Fu-Zhi 2; Wang, Xiaohui 3; Xing, Yan 4; Zhao, Xiaojun 1; Zhou, Yanchun 2
通讯作者	Zhao, Xiaojun(Zhaoxj@csu.edu.cn) ; Zhou, Yanchun(yczhou@alum.imr.ac.cn)
	2021-03-01
发表期刊	JOURNAL OF ADVANCED CERAMICS
ISSN	2226-4108
页码	18
摘要	Y2O3 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.
关键词	high-entropy ceramics rare earth oxides low thermal conductivity thermal expansion coefficient CMAS resistance
资助者	National Natural Science Foundation of China
DOI	10.1007/s40145-021-0461-6
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51972089] ; National Natural Science Foundation of China[51672064] ; National Natural Science Foundation of China[U1637210]
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics
WOS记录号	WOS:000623120900001
出版者	SPRINGER
引用统计	被引频次：93[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/321006/161038
专题	中国科学院金属研究所
通讯作者	Zhao, Xiaojun; Zhou, Yanchun
作者单位	1.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
推荐引用方式 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.