Effect of reaction routes on the porosity and permeability of porous high entropy (Y_(0.2)Yb_(0.2)Sm_(0.2)Nd_(0.2)Eu_(0.2))B_6 for transpiration cooling
查看参考文献45篇
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文摘
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Transpiration cooling technique is a reusable and high-efficiency thermal protection system (TPS), which is potential to improve the reusability and security of re-entry space vehicle. Relatively low density, high permeability and high porosity are general requirements for porous media of transpiration cooling systems. In this work, a new porous high entropy metal hexaboride (Y_(0.2)Yb_(0.2)Sm_(0.2)Nd_(0.2)Eu_(0.2))B_6 is designed and prepared by the in-situ reaction/partial sintering method.Tworeaction routes are designed to synthesize (Y_(0.2)Yb_(0.2)Sm_(0.2)Nd_(0.2)Eu_(0.2))B_6, including boron thermal reduction and borocarbon thermal reduction. The as-prepared porous HE (Y_(0.2)Yb_(0.2)Sm_(0.2)Nd_(0.2)Eu_(0.2))B_6 ceramics possess homogeneous microstructure and exhibit low density, high porosity, high compressive strength and high permeability. The combination of these properties makes porous HE (Y_(0.2)Yb_(0.2)Sm_(0.2)Nd_(0.2)Eu_(0.2))B_6 promising as a candidate porous media for various transpiration cooling applications. |
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来源
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Journal of Materials Science & Technology
,2020,38:80-85 【核心库】
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DOI
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10.1016/j.jmst.2019.09.006
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关键词
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High entropy ceramics
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(Y_(0.2)Yb_(0.2)Sm_(0.2)Nd_(0.2)Eu_(0.2))B_6
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Transpiration cooling
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Porous UHTCs
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In-situ reaction synthesis
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地址
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1.
School of Materials Science and Engineering, Tianjin University, Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin, 300072
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Aerospace Research Institute of Materials & Processing Technology, Science and Technology on Advanced Functional Composite Laboratory, Beijing, 100076
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Institute of Metal Research, Chinese Academy of Sciences, Shenyang National Laboratory for Materials Science, Shenyang, 110016
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1005-0302 |
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学科
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航天(宇宙航行) |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:6664511
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