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(La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4: A high-entropy rare-earth phosphate monazite ceramic with low thermal conductivity and good compatibility with Al2O3
Zhao, Zifan; Chen, Heng; Xiang, Huimin; Dai, Fu-Zhi; Wan, Xiaohui; Peng, Zhijian; Zhou, Yanchun
2019-12-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume35Issue:12Pages:2892-2896
AbstractLow thermal conductivity, matched thermal expansion coefficient and good compatibility are general requirements for the environmental/thermal barrier coatings (EBCs/TBCs) and interphases for Al2O3f/Al2O3 composites. In this work, a novel high-entropy (HE) rare-earth phosphate monazite ceramic (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4 is designed and successfully synthesized. This new type of HE rare-earth phosphate monazite exhibits good chemical compatibility with Al2O3, without reaction with Al2O3 as high as 1600 degrees C in air. Moreover, the thermal expansion coefficient (TEC) of HE (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4 (8.9 x 10(-6)/degrees C at 300-1000 degrees C) is close to that of Al2O3. The thermal conductivity of HE (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4 at room temperature is as low as 2.08 W.m(-1).K-1, which is about 42% lower than that of LaPO4. Good chemical compatibility, close TEC to that of Al2O3, and low thermal conductivity indicate that HE (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4 is suitable as a candidate EBC/TBC material and an interphase for Al2O3f/Al2O3 composites. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
Keyword(La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4 High-entropy ceramics Al(2)O(3)f/Al2O3 ceramic matrix composites Environmental barrier coating materials Interphase material Thermal expansion coefficient Thermal conductivity Solution synthesis Rare-earth phosphates Monazite
Indexed BySCI
Language英语
WOS IDWOS:000502840400020
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80568
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhao, Zifan,Chen, Heng,Xiang, Huimin,et al. (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4: A high-entropy rare-earth phosphate monazite ceramic with low thermal conductivity and good compatibility with Al2O3[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(12):2892-2896.
APA Zhao, Zifan.,Chen, Heng.,Xiang, Huimin.,Dai, Fu-Zhi.,Wan, Xiaohui.,...&Zhou, Yanchun.(2019).(La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4: A high-entropy rare-earth phosphate monazite ceramic with low thermal conductivity and good compatibility with Al2O3.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(12),2892-2896.
MLA Zhao, Zifan,et al."(La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4: A high-entropy rare-earth phosphate monazite ceramic with low thermal conductivity and good compatibility with Al2O3".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.12(2019):2892-2896.
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