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Porous (Y0.25Ho0.25Yb0.25Lu0.25)2Si2O7: A novel high-entropy ceramic with high porosity and excellent thermal stability

文献类型：期刊论文

作者Zhou, Jiaxin1,2; Zeng, Dawei1,2; Wu, Zhen1; Sun, Luchao1; Wang, Jingyang1
刊名JOURNAL OF THE AMERICAN CERAMIC SOCIETY
出版日期2024-06-17
页码9
关键词good high-temperature stability high-entropy (Y0.25Ho0.25Yb0.25Lu0.25)(2)Si2O7 ceramic low thermal conductivity superhigh porosity
ISSN号0002-7820
DOI10.1111/jace.19955
通讯作者Wu, Zhen(zwu@imr.ac.cn) ; Wang, Jingyang(jywang@imr.ac.cn)
英文摘要With the rapid development of hypersonic vehicles, the thermal protection systems face great challenges due to the severe aerodynamic heat. As a result, conventional fiber insulation tiles would experience severe shrinkage at high temperatures (>1500 degrees C), endangering the safety of the aircraft. To solve the problem, a high-entropy effect was introduced to increase the high-temperature resistance of thermal insulation materials, and highly porous (Y0.25Ho0.25Yb0.25Lu0.25)(2)Si2O7 was prepared by in situ reaction sintering process in this work. The fabricated porous samples present excellent overall properties, including superhigh porosity (95.09%-93.10%), lightweight (0.29-0.41 g/cm(3)), and very low thermal conductivity (0.066-0.085 W/(mK)). More importantly, porous (Y0.25Ho0.25Yb0.25Lu0.25)(2)Si2O7 has outstanding high-temperature dimensional stability. Although the porosity of the sample is higher than 90%, its linear shrinkage at 1550 degrees C for 2 h is less than 1%. The results demonstrate that porous high-entropy (Y0.25Ho0.25Yb0.25Lu0.25)(2)Si2O7 is a promising thermal insulation material in extreme high-temperature environments.
资助项目National Natural Science Foundation of China ; National Key R&D Program of China[2021YFB3702300] ; International Partnership Program of the Chinese Academy of Sciences[172GJHZ2022094FN] ; [U21A2063] ; [52372071] ; [52302076]
WOS研究方向Materials Science
语种英语
WOS记录号WOS:001248850900001
出版者WILEY
资助机构National Natural Science Foundation of China ; National Key R&D Program of China ; International Partnership Program of the Chinese Academy of Sciences
源URL  
专题金属研究所_中国科学院金属研究所
通讯作者Wu, Zhen; Wang, Jingyang
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Jiaxin,Zeng, Dawei,Wu, Zhen,et al. Porous (Y0.25Ho0.25Yb0.25Lu0.25)2Si2O7: A novel high-entropy ceramic with high porosity and excellent thermal stability[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2024:9.
APA Zhou, Jiaxin,Zeng, Dawei,Wu, Zhen,Sun, Luchao,&Wang, Jingyang.(2024).Porous (Y0.25Ho0.25Yb0.25Lu0.25)2Si2O7: A novel high-entropy ceramic with high porosity and excellent thermal stability.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,9.
MLA Zhou, Jiaxin,et al."Porous (Y0.25Ho0.25Yb0.25Lu0.25)2Si2O7: A novel high-entropy ceramic with high porosity and excellent thermal stability".JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2024):9.

入库方式： OAI收割

来源：金属研究所

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