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

doi:10.1111/jace.19955

IMR OpenIR

	Porous (Y_0.25Ho_0.25Yb_0.25Lu_0.25)₂Si₂O₇: A novel high-entropy ceramic with high porosity and excellent thermal stability
	Zhou, Jiaxin 1,2; Zeng, Dawei 1,2; Wu, Zhen 1; Sun, Luchao 1; Wang, Jingyang 1
通讯作者	Wu, Zhen(zwu@imr.ac.cn) ; Wang, Jingyang(jywang@imr.ac.cn)
	2024-06-17
发表期刊	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN	0002-7820
页码	9
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.
关键词	good high-temperature stability high-entropy (Y0.25Ho0.25Yb0.25Lu0.25)(2)Si2O7 ceramic low thermal conductivity superhigh porosity
资助者	National Natural Science Foundation of China ; National Key R&D Program of China ; International Partnership Program of the Chinese Academy of Sciences
DOI	10.1111/jace.19955
收录类别	SCI
语种	英语
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
WOS类目	Materials Science, Ceramics
WOS记录号	WOS:001248850900001
出版者	WILEY
引用统计	被引频次：2[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/321006/187186
专题	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 (Y_0.25Ho_0.25Yb_0.25Lu_0.25)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 (Y_0.25Ho_0.25Yb_0.25Lu_0.25)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 (Y_0.25Ho_0.25Yb_0.25Lu_0.25)₂Si₂O₇: A novel high-entropy ceramic with high porosity and excellent thermal stability".JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2024):9.