High porosity and low thermal conductivity high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C
Heng Chen
1
,
Huimin Xiang
2
,
Fu Zhi Dai
2
,
Jiachen Liu Jiachen Liu
3, 4, 5, 6
,
Yiming Lei
7
,
Alan M. Bond
7
,
Yanchun Zhou
1
2
Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China
|
3
Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education
4
School of Materials science and Engineering
6
Tianjin 300072 China
|
Publication type: Journal Article
Publication date: 2019-08-01
scimago Q1
wos Q1
SJR: 2.865
CiteScore: 25.4
Impact factor: 14.3
ISSN: 10050302, 19411162
Materials Chemistry
Metals and Alloys
Ceramics and Composites
Polymers and Plastics
Mechanical Engineering
Mechanics of Materials
Abstract
Porous ultra-high temperature ceramics (UHTCs) are promising for ultrahigh-temperature thermal insulation applications. However, the main limitations for their applications are the high thermal conductivity and densification of porous structure at high temperatures. In order to overcome these obstacles, herein, porous high entropy (Zr0.2Hf0.2Ti0.2Nb0.2 Ta0.2)C was prepared by a simple method combing in-situ reaction and partial sintering. Porous high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C possesses homogeneous microstructure with grain size in the range of 100–500 nm and pore size in the range of 0.2–1 μm, which exhibits high porosity of 80.99%, high compressive strength of 3.45 MPa, low room temperature thermal conductivity of 0.39 W·m−1 K−1, low thermal diffusivity of 0.74 mm2·s−1 and good high temperature stability. The combination of these properties renders porous high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C promising as light-weight ultrahigh temperature thermal insulation materials.
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Chen H. et al. High porosity and low thermal conductivity high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C // Journal of Materials Science and Technology. 2019. Vol. 35. No. 8. pp. 1700-1705.
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Chen H., Xiang H., Dai F. Z., Jiachen Liu J. L., Lei Y., Bond A. M., Zhou Y. High porosity and low thermal conductivity high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C // Journal of Materials Science and Technology. 2019. Vol. 35. No. 8. pp. 1700-1705.
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TY - JOUR
DO - 10.1016/j.jmst.2019.04.006
UR - https://doi.org/10.1016/j.jmst.2019.04.006
TI - High porosity and low thermal conductivity high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C
T2 - Journal of Materials Science and Technology
AU - Chen, Heng
AU - Xiang, Huimin
AU - Dai, Fu Zhi
AU - Jiachen Liu, Jiachen Liu
AU - Lei, Yiming
AU - Bond, Alan M.
AU - Zhou, Yanchun
PY - 2019
DA - 2019/08/01
PB - Springer Nature
SP - 1700-1705
IS - 8
VL - 35
SN - 1005-0302
SN - 1941-1162
ER -
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@article{2019_Chen,
author = {Heng Chen and Huimin Xiang and Fu Zhi Dai and Jiachen Liu Jiachen Liu and Yiming Lei and Alan M. Bond and Yanchun Zhou},
title = {High porosity and low thermal conductivity high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C},
journal = {Journal of Materials Science and Technology},
year = {2019},
volume = {35},
publisher = {Springer Nature},
month = {aug},
url = {https://doi.org/10.1016/j.jmst.2019.04.006},
number = {8},
pages = {1700--1705},
doi = {10.1016/j.jmst.2019.04.006}
}
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Chen, Heng, et al. “High porosity and low thermal conductivity high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C.” Journal of Materials Science and Technology, vol. 35, no. 8, Aug. 2019, pp. 1700-1705. https://doi.org/10.1016/j.jmst.2019.04.006.