High entropy defective fluorite structured rare-earth niobates and tantalates for thermal barrier applications

doi:10.1007/s40145-020-0368-7

IMR OpenIR

	High entropy defective fluorite structured rare-earth niobates and tantalates for thermal barrier applications
	Zhao,Zifan 1,2; Chen,Heng 1; Xiang,Huimin 1; Dai,Fu-Zhi 1; Wang,Xiaohui 3; Xu,Wei 4; Sun,Kuang 4; Peng,Zhijian 2; Zhou,Yanchun 1
通讯作者	Peng,Zhijian(pengzhijian@cugb.edu.cn) ; Zhou,Yanchun(yczhou@alum.imr.ac.cn)
	2020-06-05
发表期刊	Journal of Advanced Ceramics
ISSN	2226-4108
卷号	9 期号:3 页码:303-311
摘要	AbstractRare-earth tantalates and niobates (RE3TaO7 and RE3NbO7) have been considered as promising candidate thermal barrier coating (TBC) materials in next generation gas-turbine engines due to their ultra-low thermal conductivity and better thermal stability than yttria-stabilized zirconia (YSZ). However, the low Vickers hardness and toughness are the main shortcomings of RE3TaO7 and RE3NbO7 that limit their applications as TBC materials. To increase the hardness, high entropy (Y1/3Yb1/3Er1/3)3TaO7, (Y1/3Yb1/3Er1/3)3NbO7, and (Sm1/6Eu1/6Y1/6Yb1/6Lu1/6Er1/6)3(Nb1/2Ta1/2)O7 are designed and synthesized in this study. These high entropy ceramics exhibit high Vickers hardness (10.9–12.0 GPa), close thermal expansion coefficients to that of single-principal-component RE3TaO7 and RE3NbO7 (7.9×10?6-10.8×10?6C?1 at room temperature), good phase stability, and good chemical compatibility with thermally grown Al2O3, which make them promising for applications as candidate TBC materials.
关键词	high entropy ceramics defective fluorite structure rare-earth niobates/tantalates thermal barrier coating material
DOI	10.1007/s40145-020-0368-7
语种	英语
WOS记录号	BMC:10.1007/s40145-020-0368-7
出版者	Tsinghua University Press
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/80480
专题	中国科学院金属研究所
通讯作者	Peng,Zhijian; Zhou,Yanchun
作者单位	1.Aerospace Research Institute of Materials & Processing Technology; Science and Technology on Advanced Functional Composite Laboratory 2.China University of Geosciences; School of Engineering and Technology 3.Chinese Academy of Sciences; Shenyang National Laboratory for Materials Science, Institute of Metal Research 4.Shanghai Chenhua Science and Technology Corporation Ltd.
推荐引用方式 GB/T 7714	Zhao,Zifan,Chen,Heng,Xiang,Huimin,et al. High entropy defective fluorite structured rare-earth niobates and tantalates for thermal barrier applications[J]. Journal of Advanced Ceramics,2020,9(3):303-311.
APA	Zhao,Zifan.,Chen,Heng.,Xiang,Huimin.,Dai,Fu-Zhi.,Wang,Xiaohui.,...&Zhou,Yanchun.(2020).High entropy defective fluorite structured rare-earth niobates and tantalates for thermal barrier applications.Journal of Advanced Ceramics,9(3),303-311.
MLA	Zhao,Zifan,et al."High entropy defective fluorite structured rare-earth niobates and tantalates for thermal barrier applications".Journal of Advanced Ceramics 9.3(2020):303-311.