(La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7: A novel high-entropy ceramic with low thermal conductivity and sluggish grain growth rate
2
Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China
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Publication type: Journal Article
Publication date: 2019-11-01
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
Fine grains and slow grain growth rate are beneficial to preventing the thermal stress-induced cracking and thermal conductivity increase of thermal barrier coatings. Inspired by the sluggish diffusion effect of high-entropy materials, a novel high-entropy (HE) rare-earth zirconate solid solution (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7 was designed and successfully synthesized in this work. The as-synthesized (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7 is phase-pure with homogeneous rare-earth element distribution. The thermal conductivity of as-synthesized (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7 at room temperature is as low as 0.76 W m-1 K-1. Moreover, after being heated at 1500 °C for 1–18 h, the average grain size of (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7 only increases from 1.69 μm to 3.92 μm, while the average grain size of La2Zr2O7 increases from 1.96 μm to 8.89 μm. Low thermal conductivity and sluggish grain growth rate indicate that high-entropy (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7 is suitable for application as a thermal barrier coating material and it may possess good thermal stress-induced cracking resistance.
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Zhao Z. et al. (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7: A novel high-entropy ceramic with low thermal conductivity and sluggish grain growth rate // Journal of Materials Science and Technology. 2019. Vol. 35. No. 11. pp. 2647-2651.
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Zhao Z., Xiang H., Dai F., PENG Z., Zhou Y. (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7: A novel high-entropy ceramic with low thermal conductivity and sluggish grain growth rate // Journal of Materials Science and Technology. 2019. Vol. 35. No. 11. pp. 2647-2651.
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TY - JOUR
DO - 10.1016/j.jmst.2019.05.054
UR - https://doi.org/10.1016/j.jmst.2019.05.054
TI - (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7: A novel high-entropy ceramic with low thermal conductivity and sluggish grain growth rate
T2 - Journal of Materials Science and Technology
AU - Zhao, Zifan
AU - Xiang, Huimin
AU - Dai, Fu-Zhi
AU - PENG, ZHIJIAN
AU - Zhou, Yanchun
PY - 2019
DA - 2019/11/01
PB - Springer Nature
SP - 2647-2651
IS - 11
VL - 35
SN - 1005-0302
SN - 1941-1162
ER -
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@article{2019_Zhao,
author = {Zifan Zhao and Huimin Xiang and Fu-Zhi Dai and ZHIJIAN PENG and Yanchun Zhou},
title = {(La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7: A novel high-entropy ceramic with low thermal conductivity and sluggish grain growth rate},
journal = {Journal of Materials Science and Technology},
year = {2019},
volume = {35},
publisher = {Springer Nature},
month = {nov},
url = {https://doi.org/10.1016/j.jmst.2019.05.054},
number = {11},
pages = {2647--2651},
doi = {10.1016/j.jmst.2019.05.054}
}
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Zhao, Zifan, et al. “(La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7: A novel high-entropy ceramic with low thermal conductivity and sluggish grain growth rate.” Journal of Materials Science and Technology, vol. 35, no. 11, Nov. 2019, pp. 2647-2651. https://doi.org/10.1016/j.jmst.2019.05.054.