High entropy ultra-high temperature ceramic thermal insulator (Zr1/5Hf1/5Nb1/5Ta1/5Ti1/5)C with controlled microstructure and outstanding properties
文献类型：期刊论文
| 作者 | Shao, Zhuojie1,2; Wu, Zhen1; Sun, Luchao1; Liang, Xianpeng1,2; Luo, Zhaoping1; Chen, Haikun3; Li, Junning3; Wang, Jingyang1 |
| 刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2022-08-20 |
| 卷号 | 119页码:190-199 |
| ISSN号 | 1005-0302 |
| 关键词 | High entropy UHTCs High porosity High strength Low thermal conductivity Oxidation resistance |
| DOI | 10.1016/j.jmst.2021.12.030 |
| 通讯作者 | Wu, Zhen(zwu@imr.ac.cn) ; Wang, Jingyang(jywang@imr.ac.cn) |
| 英文摘要 | 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. |
| 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 |
| 语种 | 英语 |
| 出版者 | JOURNAL MATER SCI TECHNOL |
| WOS记录号 | WOS:000788127200009 |
| 资助机构 | National Key R&D Program of China ; LiaoNing Revitaliza-tion Talents Program |
| 源URL | [http://ir.imr.ac.cn/handle/321006/172617]  |
| 专题 | 金属研究所_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. |
入库方式： OAI收割
来源：金属研究所
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