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240108s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202311870
|2 doi
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|a eng
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| 100 |
1 |
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|a Wen, Zihao
|e verfasserin
|4 aut
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| 245 |
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|a Ultrastrong and High Thermal Insulating Porous High-Entropy Ceramics up to 2000 °C
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|c 2024
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 04.04.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2024 Wiley‐VCH GmbH.
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|a High mechanical load-carrying capability and thermal insulating performance are crucial to thermal-insulation materials under extreme conditions. However, these features are often difficult to achieve simultaneously in conventional porous ceramics. Here, for the first time, it is reported a multiscale structure design and fast fabrication of 9-cation porous high-entropy diboride ceramics via an ultrafast high-temperature synthesis technique that can lead to exceptional mechanical load-bearing capability and high thermal insulation performance. With the construction of multiscale structures involving ultrafine pores at the microscale, high-quality interfaces between building blocks at the nanoscale, and severe lattice distortion at the atomic scale, the materials with an ≈50% porosity exhibit an ultrahigh compressive strength of up to ≈337 MPa at room temperature and a thermal conductivity as low as ≈0.76 W m-1 K-1. More importantly, they demonstrate exceptional thermal stability, with merely ≈2.4% volume shrinkage after 2000 °C annealing. They also show an ultrahigh compressive strength of ≈690 MPa up to 2000 °C, displaying a ductile compressive behavior. The excellent mechanical and thermal insulating properties offer an attractive material for reliable thermal insulation under extreme conditions
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|a Journal Article
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|a compressive strength
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|a high‐entropy diborides
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|a high‐temperature behaviors
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|a porous materials
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| 650 |
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4 |
|a thermal conductivity
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| 700 |
1 |
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|a Tang, Zhongyu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Yiwen
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhuang, Lei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yu, Hulei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chu, Yanhui
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 14 vom: 11. Apr., Seite e2311870
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
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|g volume:36
|g year:2024
|g number:14
|g day:11
|g month:04
|g pages:e2311870
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|u http://dx.doi.org/10.1002/adma.202311870
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