| High entropy ultra-high temperature ceramic thermal insulator (Zr1/5Hf1/5Nb1/5Ta1/5Ti1/5)C with controlled microstructure and outstanding properties | |
| Shao, Zhuojie1,2; Wu, Zhen1; Sun, Luchao1; Liang, Xianpeng1,2; Luo, Zhaoping1; Chen, Haikun3; Li, Junning3; Wang, Jingyang1 | |
| Corresponding Author | Wu, Zhen(zwu@imr.ac.cn) ; Wang, Jingyang(jywang@imr.ac.cn) |
| 2022-08-20 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 119Pages:190-199 |
| Abstract | 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. |
| Keyword | High entropy UHTCs High porosity High strength Low thermal conductivity Oxidation resistance |
| Funding Organization | National Key R&D Program of China ; LiaoNing Revitaliza-tion Talents Program |
| DOI | 10.1016/j.jmst.2021.12.030 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key R&D Program of China[2017YFB0703201] ; LiaoNing Revitaliza-tion Talents Program[XLYC2002018] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000788127200009 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/172618 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wu, Zhen; Wang, Jingyang |
| Affiliation | 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 |
| Recommended Citation 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. |
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