High porosity and low thermal conductivity high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C

doi:10.1016/j.jmst.2019.04.006

IMR OpenIR

	High porosity and low thermal conductivity high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C
	Chen, Heng 1,2; Xiang, Huimin 1; Dai, Fu-Zhi 1; Liu, Jiachen 2; Lei, Yiming 3; Zhang, Jie 3; Zhou, Yanchun 1,2
通讯作者	Zhou, Yanchun(yczhou@imr.ac.cn)
	2019-08-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	35 期号:8 页码:1700-1705
摘要	Porous ultra-high temperature ceramics (UHTCs) are promising for ultrahigh-temperature thermal insulation applications. However, the main limitations for their applications are the high thermal conductivity and densification of porous structure at high temperatures. In order to overcome these obstacles, herein, porous high entropy (Zr0.2Hf0.2Ti0.2Nb0.2 Ta-0.2)C was prepared by a simple method combing in-situ reaction and partial sintering. Porous high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C possesses homogeneous microstructure with grain size in the range of 100-500 nm and pore size in the range of 0.2-1 mu m, which exhibits high porosity of 80.99%, high compressive strength of 3.45 MPa, low room temperature thermal conductivity of 0.39 W.m(-1) K-1, low thermal diffusivity of 0.74 mm(2).s(-1) and good high temperature stability. The combination of these properties renders porous high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C promising as light-weight ultrahigh temperature thermal insulation materials. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Ultrahigh temperature ceramics (UHTCs) High entropy ceramics (Zr0.2Hf0.2Ti0.2 Nb0.2Ta0.2)C Thermal conductivity Porosity
资助者	National Natural Science Foundation of China ; Beijing Municipal Science & Technology Commission
DOI	10.1016/j.jmst.2019.04.006
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[U1435206] ; National Natural Science Foundation of China[51672064] ; Beijing Municipal Science & Technology Commission[D161100002416001]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000470677300022
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：182[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/321006/133772
专题	中国科学院金属研究所
通讯作者	Zhou, Yanchun
作者单位	1.Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China 2.Tianjin Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Ceram & Machining Technol, Tianjin 300072, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Chen, Heng,Xiang, Huimin,Dai, Fu-Zhi,et al. High porosity and low thermal conductivity high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(8):1700-1705.
APA	Chen, Heng.,Xiang, Huimin.,Dai, Fu-Zhi.,Liu, Jiachen.,Lei, Yiming.,...&Zhou, Yanchun.(2019).High porosity and low thermal conductivity high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(8),1700-1705.
MLA	Chen, Heng,et al."High porosity and low thermal conductivity high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.8(2019):1700-1705.