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Phase composition and property evolution of (Yb1-xHox)(2)Si2O7 solid solution as environmental/thermal barrier coating candidates
Lv, Xirui1,2; Cui, Jingping1; Zhang, Jie1; Wang, Jingyang1
Corresponding AuthorZhang, Jie(jiezhang@imr.ac.cn) ; Wang, Jingyang(jywang@imr.ac.cn)
2022-08-01
Source PublicationJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
Volume42Issue:10Pages:4377-4387
AbstractRE disilicates are good candidates as environmental/thermal barrier coating for SiCf/SiC composite in harsh gas turbine engines. We designed (Yb1-xHox)(2)Si2O7 solid solutions and studied mechanical properties, thermal properties, and water vapor resistance. Powders with different compositions were synthesized by pressureless sintering, and bulk samples were prepared by Spark Plasma Sintering (SPS). Polymorphic changes with temperature and composition of the solid solutions were examined. Through doping Ho into Yb2Si2O7, water vapor corrosion resistance is significantly promoted, and thermal expansion coefficient is maintained close to that of Si based ceramics. Compared with host disilicates, thermal conductivity of solid solutions are decreased, and mechanical properties, including Vickers hardness and fracture toughness, are increased. A two-phase domain is found at (Yb1/2Ho1/2)(2)Si2O7, and the gamma to delta phase transition of Ho2Si2O7 is observed during SPS. Among all samples, gamma-(Yb1/3Ho2/3)(2)Si2O7 possesses superior high temperature stability, and excellent water vapor resistance, indicating its performance as environmental/thermal barrier coating.
KeywordRE disilicates Solid solution Phase evolution Property
Funding OrganizationNational Science and Technology Major Project, China ; International Cooperation Key Program, China ; Key Research Program of the Chinese Academy of Sciences, China ; Natural Science Foundation of China ; Natural Science Foundation of Liaoning Province, China ; LiaoNing Revitalization Talents Program, China
DOI10.1016/j.jeurceramsoc.2022.04.020
Indexed BySCI
Language英语
Funding ProjectNational Science and Technology Major Project, China[2017-VI-0020-0093] ; International Cooperation Key Program, China[174321KYSB20180008] ; Key Research Program of the Chinese Academy of Sciences, China[ZDRW-CN-2021-2-2] ; Natural Science Foundation of China[51772302] ; Natural Science Foundation of Liaoning Province, China[2020-MS-006] ; LiaoNing Revitalization Talents Program, China[XLYC2002018]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000797940400001
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174279
Collection中国科学院金属研究所
Corresponding AuthorZhang, Jie; Wang, Jingyang
Affiliation1.Inst Met Sci & Technol, Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Shenyang, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Peoples R China
Recommended Citation
GB/T 7714
Lv, Xirui,Cui, Jingping,Zhang, Jie,et al. Phase composition and property evolution of (Yb1-xHox)(2)Si2O7 solid solution as environmental/thermal barrier coating candidates[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2022,42(10):4377-4387.
APA Lv, Xirui,Cui, Jingping,Zhang, Jie,&Wang, Jingyang.(2022).Phase composition and property evolution of (Yb1-xHox)(2)Si2O7 solid solution as environmental/thermal barrier coating candidates.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,42(10),4377-4387.
MLA Lv, Xirui,et al."Phase composition and property evolution of (Yb1-xHox)(2)Si2O7 solid solution as environmental/thermal barrier coating candidates".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 42.10(2022):4377-4387.
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