High entropy ultra-high temperature ceramic thermal insulator (Zr1/5Hf1/5Nb1/5Ta1/5Ti1/5)C with controlled microstructure and outstanding properties

doi:10.1016/j.jmst.2021.12.030

IMR OpenIR

	High entropy ultra-high temperature ceramic thermal insulator (Zr1/5Hf1/5Nb1/5Ta1/5Ti1/5)C with controlled microstructure and outstanding properties
	Shao, Zhuojie 1,2; Wu, Zhen 1; Sun, Luchao 1; Liang, Xianpeng 1,2; Luo, Zhaoping 1; Chen, Haikun 3; Li, Junning 3; Wang, Jingyang 1
通讯作者	Wu, Zhen(zwu@imr.ac.cn) ; Wang, Jingyang(jywang@imr.ac.cn)
	2022-08-20
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	119 页码:190-199
摘要	Due to advancements of hypersonic vehicles, ultra-high temperature thermal insulation materials are urgently requested to shield harsh environment with superhigh heat flux. Toward this target, ultra-high temperature ceramics (UHTCs) are the only choice due to their excellent capability at ultra-high temperatures. We herein report a novel highly porous high entropy (Zr1/5Hf1/5Nb1/5Ta1/5Ti1/5)C fabricated by foam-gelcasting-freeze drying technology combined with in-situ pressureless reaction sintering. The porous (Zr1/5Hf1/5Nb1/5Ta1/5Ti1/5)C exhibited ultra-high porosity of 86.4%-95.9%, as well as high strength and low thermal conductivity of 0.70-11.77 MPa and 0.164-0.239 W/(m.K), respectively. Specifically, SiC sintering additive only locates at the pit of the surface of sintering neck between UHTC grains, and there is no secondary phase or intergranular film at the grain boundary. Besides, the oxidation resistance of high entropy carbide powders is greatly improved compared with that of the mixed five carbide powders. This work clearly highlights the merits of highly porous high entropy (Zr1/5Hf1/5Nb1/5Ta1/5Ti1/5)C as an ultra-high temperature thermal insulation material. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	High entropy UHTCs High porosity High strength Low thermal conductivity Oxidation resistance
资助者	National Key R&D Program of China ; LiaoNing Revitaliza-tion Talents Program
DOI	10.1016/j.jmst.2021.12.030
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2017YFB0703201] ; LiaoNing Revitaliza-tion Talents Program[XLYC2002018]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000788127200009
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：33[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/321006/172618
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, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composites Lab, Beijing 100076, Peoples R China
推荐引用方式 GB/T 7714	Shao, Zhuojie,Wu, Zhen,Sun, Luchao,et al. High entropy ultra-high temperature ceramic thermal insulator (Zr1/5Hf1/5Nb1/5Ta1/5Ti1/5)C with controlled microstructure and outstanding properties[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,119:190-199.
APA	Shao, Zhuojie.,Wu, Zhen.,Sun, Luchao.,Liang, Xianpeng.,Luo, Zhaoping.,...&Wang, Jingyang.(2022).High entropy ultra-high temperature ceramic thermal insulator (Zr1/5Hf1/5Nb1/5Ta1/5Ti1/5)C with controlled microstructure and outstanding properties.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,119,190-199.
MLA	Shao, Zhuojie,et al."High entropy ultra-high temperature ceramic thermal insulator (Zr1/5Hf1/5Nb1/5Ta1/5Ti1/5)C with controlled microstructure and outstanding properties".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 119(2022):190-199.