Porous high-entropy (Zr0.25Hf0.25Nb0.25Ti0.25)C with high strength and uniform pore structure fabricated by freeze-casting

doi:10.1007/s10853-024-09456-0

IMR OpenIR

	Porous high-entropy (Zr_0.25Hf_0.25Nb_0.25Ti_0.25)C with high strength and uniform pore structure fabricated by freeze-casting
	Zeng, Dawei 1,2; Zhou, Jiaxin 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)
	2024-06-01
发表期刊	JOURNAL OF MATERIALS SCIENCE
ISSN	0022-2461
卷号	59 期号:22 页码:9941-9951
摘要	Ultra-high temperature ceramics (UHTCs) are considered as promising thermal insulation materials applied in ultra-high temperature environments (>2000 degrees C). However, the high thermal conductivity and high density limit their further development and application. Herein we adopt the strategies of introducing porous structure and high-entropy effect to solve the above problems. Thus porous high-entropy (Zr0.25Hf0.25Nb0.25Ti0.25)C ceramics were prepared. In order to obtain the uniform pore structure and high mechanical property, the camphene-based freeze-casting method was used in this study. The as-prepared porous samples exhibit high porosity of 92.01-73.57% and homogeneously interconnected pore structure with average pore size of 40.8-19.6 mu m. Besides, this work realizes the aims of lightweight (0.65-2.15 g/cm(3)) and low thermal conductivity (0.29-1.53 W/(m.K)). More importantly, porous samples still have the merit of high compressive strength (0.38-29.02 MPa) due to the even microstructure. The results show that highly porous high-entropy (Zr0.25Hf0.25Nb0.25Ti0.25)C with good overall properties can be an excellent candidate material for ultra-high temperature thermal insulation.
资助者	National Natural Science Foundation of China ; National Key R&D Program of China ; LiaoNing Revitalization Talents Program ; Natural Science Foundation of Liaoning Province
DOI	10.1007/s10853-024-09456-0
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[U21A2063] ; National Natural Science Foundation of China[52372071] ; National Key R&D Program of China[2021YFB3702300] ; LiaoNing Revitalization Talents Program[XLYC2002018] ; Natural Science Foundation of Liaoning Province[2022-MS-007]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001376964600016
出版者	SPRINGER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/181046
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 230026, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Dawei,Zhou, Jiaxin,Wu, Zhen,et al. Porous high-entropy (Zr_0.25Hf_0.25Nb_0.25Ti_0.25)C with high strength and uniform pore structure fabricated by freeze-casting[J]. JOURNAL OF MATERIALS SCIENCE,2024,59(22):9941-9951.
APA	Zeng, Dawei,Zhou, Jiaxin,Wu, Zhen,Sun, Luchao,&Wang, Jingyang.(2024).Porous high-entropy (Zr_0.25Hf_0.25Nb_0.25Ti_0.25)C with high strength and uniform pore structure fabricated by freeze-casting.JOURNAL OF MATERIALS SCIENCE,59(22),9941-9951.
MLA	Zeng, Dawei,et al."Porous high-entropy (Zr_0.25Hf_0.25Nb_0.25Ti_0.25)C with high strength and uniform pore structure fabricated by freeze-casting".JOURNAL OF MATERIALS SCIENCE 59.22(2024):9941-9951.