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High entropy defective fluorite structured rare-earth niobates and tantalates for thermal barrier applications
Zhao,Zifan1,2; Chen,Heng1; Xiang,Huimin1; Dai,Fu-Zhi1; Wang,Xiaohui3; Xu,Wei4; Sun,Kuang4; Peng,Zhijian2; Zhou,Yanchun1
Corresponding AuthorPeng,Zhijian(pengzhijian@cugb.edu.cn) ; Zhou,Yanchun(yczhou@alum.imr.ac.cn)
2020-06-05
Source PublicationJournal of Advanced Ceramics
ISSN2226-4108
Volume9Issue:3
AbstractAbstractRare-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.
Keywordhigh entropy ceramics defective fluorite structure rare-earth niobates/tantalates thermal barrier coating material
DOI10.1007/s40145-020-0368-7
Language英语
WOS IDBMC:10.1007/s40145-020-0368-7
PublisherTsinghua University Press
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80478
Corresponding AuthorPeng,Zhijian; Zhou,Yanchun
Affiliation1.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.
Recommended Citation
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).
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).
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).
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