High-entropy (Y0.2Nd0.2Sm0.2Eu0.2Er0.2)AlO3: A promising thermal/environmental barrier material for oxide/oxide composites
Zhaoa, Zifan1,2; Chen, Heng1; Xiang, Huimin1; Dai, Fu-Zhi1; Wang, Xiaohui3; Xu, Wei4; Sun, Kuang4; Peng, Zhijian2; Zhou, Yanchun1
Corresponding AuthorPeng, Zhijian( ; Zhou, Yanchun(
AbstractYttrium aluminum perovskite (YAlO3) is a promising candidate material for environmental barrier coatings (EBCs) to protect Al(2)O(3)f/Al2O3 ceramic matrix composites (CMCs) from the corrosion of high-temperature water vapor in combustion environments. Nevertheless, the relatively high thermal conductivity is a notable drawback of YAlO3 for environmental barrier coating application. Herein, in order to make REAlO3 more thermal insulating, a novel high-entropy rare-earth aluminate ceramic (Y0.2Nd0.2Sm0.2Eu0.2Er0.2)AlO3 was designed and synthesized. The as-prepared (Y0.2Nd0.2Sm0.2Eu0.2Er0.2)AlO3 ceramic possesses close thermal expansion coefficient (9.02 x 10(-6) /degrees C measured from room temperature to 1200 degrees C) to that of Al2O3. The thermal conductivity of (Y0.2Nd0.2Sm0.2Eu0.2Er0.2) AlO3 at room temperature is 4.1 W.m(-1) K-1, which is almost one third of the value of YAlO3. Furthermore, to effectively prevent the penetration of water vapor from possible pores/cracks of coating layer, which are often observed in T/EBCs, a tri-layer EBC system REAlO3/RE3Al5O12/(Al(2)O(3)f/Al2O3 CMCs) is designed. Close thermal expansion coefficient to Al2O3 and low thermal conductivity of (Y0.2Nd0.2Sm0.2Eu0.2Er0.2)AlO3, as well as the formation of dense garnet layer at (Y0.2Nd0.2Sm0.2Eu0.2Er0.2)AlO3/Al2O3 interface, indicate that this new type of high-entropy ceramic is suitable as a candidate environmental barrier coating material for Al(2)O(3)f/Al2O3 CMCs. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordHigh-entropy ceramics (Y0.2Nd0.2Sm0.2Eu0.2Er0.2)AlO3 Tri-layer EBC system Low thermal conductivity Al2O3f/Al2O3 CMCs
Funding OrganizationNational Natural Science Foundation of China
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[51672064] ; National Natural Science Foundation of China[51972089]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000526956900006
Citation statistics
Cited Times:42[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorPeng, Zhijian; Zhou, Yanchun
Affiliation1.Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China
2.China Univ Geosci, Sch Engn & Technol, Beijing 100083, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
4.Shanghai Chenhua Sci & Technol Corp Limted, Shanghai 201804, Peoples R China
Recommended Citation
GB/T 7714
Zhaoa, Zifan,Chen, Heng,Xiang, Huimin,et al. High-entropy (Y0.2Nd0.2Sm0.2Eu0.2Er0.2)AlO3: A promising thermal/environmental barrier material for oxide/oxide composites[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,47:45-51.
APA Zhaoa, Zifan.,Chen, Heng.,Xiang, Huimin.,Dai, Fu-Zhi.,Wang, Xiaohui.,...&Zhou, Yanchun.(2020).High-entropy (Y0.2Nd0.2Sm0.2Eu0.2Er0.2)AlO3: A promising thermal/environmental barrier material for oxide/oxide composites.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,47,45-51.
MLA Zhaoa, Zifan,et al."High-entropy (Y0.2Nd0.2Sm0.2Eu0.2Er0.2)AlO3: A promising thermal/environmental barrier material for oxide/oxide composites".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 47(2020):45-51.
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