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(Ho0.25Lu0.25Yb0.25Eu0.25)(2)SiO5 high-entropy ceramic with low thermal conductivity, tunable thermal expansion coefficient, and excellent resistance to CMAS corrosion
Chen, Zhilin1; Tian, Zhilin1; Zheng, Liya1; Ming, Keyu1; Ren, Xiaomin2,3; Wang, Jingyang2; Li, Bin1
Corresponding AuthorTian, Zhilin(tianzhlin@mail.sysu.edu.cn) ; Li, Bin(libin75@mail.sysu.edu.cn)
2022-06-15
Source PublicationJOURNAL OF ADVANCED CERAMICS
ISSN2226-4108
Pages15
AbstractLow thermal conductivity, compatible thermal expansion coefficient, and good calcium-magnesium-aluminosilicate (CMAS) corrosion resistance are critical requirements of environmental barrier coatings for silicon-based ceramics. Rare earth silicates have been recognized as one of the most promising environmental barrier coating candidates for good water vapor corrosion resistance. However, the relatively high thermal conductivity and high thermal expansion coefficient limit the practical application. Inspired by the high entropy effect, a novel rare earth monosilicate solid solution (Ho0.25Lu0.25Yb0.25Eu0.25)(2)SiO5 was designed to improve the overall performance. The as-synthesized (Ho0.25Lu0.25Yb0.25Eu0.25)(2)SiO5 shows very low thermal conductivity (1.07 W.m(-1).K-1 at 600 degrees C). Point defects including mass mismatch and oxygen vacancies mainly contribute to the good thermal insulation properties. The thermal expansion coefficient of (Ho0.25Lu0.25Yb0.25Eu0.25)(2)SiO5 can be decreased to (4.0-5.9)x10(-6) K-1 due to severe lattice distortion and chemical bonding variation, which matches well with that of SiC ((4.5-5.5)x10(-6) K-1). In addition, (Ho0.25Lu0.25Yb0.25Eu0.25)(2)SiO5 presents good resistance to CMAS corrosion. The improved performance of (Ho0.25Lu0.25Yb0.25Eu0.25)(2)SiO5 highlights it as a promising environmental barrier coating candidate.
Keywordhigh-entropy ceramic environmental barrier coating (EBC) rare earth silicate thermal conductivity thermal expansion coefficient (TEC)
Funding OrganizationGuangdong Basic and Applied Basic Research Foundation for Distinguished Young Scholars ; Guang Dong Basic and Applied Basic Research Foundation for Young Scholars ; Shenzhen Science and Technology Program ; Fundamental Research Funds for the Central Universities, Sun Yat-sen University
DOI10.1007/s40145-022-0609-z
Indexed BySCI
Language英语
Funding ProjectGuangdong Basic and Applied Basic Research Foundation for Distinguished Young Scholars[2021B1515020083] ; Guang Dong Basic and Applied Basic Research Foundation for Young Scholars[21201910240002803] ; Shenzhen Science and Technology Program[GXWD20201231165807008] ; Shenzhen Science and Technology Program[20200831172254001] ; Fundamental Research Funds for the Central Universities, Sun Yat-sen University[2021qntd10]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000811954800002
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174447
Collection中国科学院金属研究所
Corresponding AuthorTian, Zhilin; Li, Bin
Affiliation1.Sun Yat Sen Univ, Sch Mat, Shenzhen Campus, Shenzhen 518107, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Chen, Zhilin,Tian, Zhilin,Zheng, Liya,et al. (Ho0.25Lu0.25Yb0.25Eu0.25)(2)SiO5 high-entropy ceramic with low thermal conductivity, tunable thermal expansion coefficient, and excellent resistance to CMAS corrosion[J]. JOURNAL OF ADVANCED CERAMICS,2022:15.
APA Chen, Zhilin.,Tian, Zhilin.,Zheng, Liya.,Ming, Keyu.,Ren, Xiaomin.,...&Li, Bin.(2022).(Ho0.25Lu0.25Yb0.25Eu0.25)(2)SiO5 high-entropy ceramic with low thermal conductivity, tunable thermal expansion coefficient, and excellent resistance to CMAS corrosion.JOURNAL OF ADVANCED CERAMICS,15.
MLA Chen, Zhilin,et al."(Ho0.25Lu0.25Yb0.25Eu0.25)(2)SiO5 high-entropy ceramic with low thermal conductivity, tunable thermal expansion coefficient, and excellent resistance to CMAS corrosion".JOURNAL OF ADVANCED CERAMICS (2022):15.
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