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Mechanical and thermal properties of RE4Hf3O12 (RE=Ho, Er, Tm) ceramics with defect fluorite structure
Hu, Wanpeng; Lei, Yiming; Zhang, Jie; Wang, Jingyang
2019-09-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume35Issue:9Pages:2064-2069
AbstractThe thermal and environmental barrier coatings (T/EBC) are technologically important for advanced propulsion engine system. In this study. RE4Hf3O12 (RE=Ho, Er, Tm) with defect fluorite structure was investigated for potential use as top TBC layer. Dense pellets were fabricated via a hot pressing method and the mechanical and thermal properties were characterized. RE4Hf3O12 (RE=Ho, Er, Tm) possessed a high Vickers hardness of 11 GPa. The material retained high elastic modulus at elevated temperatures up to 1773 K, which made it attractive for high temperature application. The coefficient of thermal expansion (CTE) of RE4Hf3O12 (RE = Ho, Er, Tm) laid in the range between 7 x 10(-6) K-1 to 10 x 10(-6) K-1 from 473 K to 1673 K. In addition, the rare earth hafnates exhibited lower thermal conductivity which rendered it a good candidate material for thermal barrier applications. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordRare earth hafnate Thermal/environmental barrier coating Mechanical property Thermal property
Indexed BySCI
Language英语
WOS IDWOS:000475870600033
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80812
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Hu, Wanpeng,Lei, Yiming,Zhang, Jie,et al. Mechanical and thermal properties of RE4Hf3O12 (RE=Ho, Er, Tm) ceramics with defect fluorite structure[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(9):2064-2069.
APA Hu, Wanpeng,Lei, Yiming,Zhang, Jie,&Wang, Jingyang.(2019).Mechanical and thermal properties of RE4Hf3O12 (RE=Ho, Er, Tm) ceramics with defect fluorite structure.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(9),2064-2069.
MLA Hu, Wanpeng,et al."Mechanical and thermal properties of RE4Hf3O12 (RE=Ho, Er, Tm) ceramics with defect fluorite structure".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.9(2019):2064-2069.
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