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Microstructure and phase composition evolution of dual-phase ytterbium silicate coatings plasma sprayed from stoichiometric Yb2Si2O7 feedstock powder
Wang, Haoyu1,2; Zhang, Jie1; Sun, Luchao1; Wang, Jingyang1
Corresponding AuthorZhang, Jie(jiezhang@imr.ac.cn)
2022-05-15
Source PublicationSURFACE & COATINGS TECHNOLOGY
ISSN0257-8972
Volume437Pages:10
AbstractThe main challenges of atmospheric plasma spraying (APS) when dealing with rare earth silicate are the amorphous phase formation and silica volatilization in as-sprayed coatings. In this study, the microstructure and phase composition evolution of dual-phase ytterbium silicate environmental barrier coatings (EBCs) plasma sprayed from stoichiometric Yb2Si2O7 feedstock powder are investigated. The unavoidable silica volatilization leads to the coating composition deviate from stoichiometry of disilicate composition and result in the presence of Yb2SiO5 in coatings. By controlling the phase fraction of Yb2SiO5 through modulation of plasma character allows minimizing the effects of thermal residual stress on the coating durability in thermal cycling. The high crystallinity and crack-free coatings were achieved through optimized crystallization heat treatment. The presence of dislocation and deformation twins endow the dual-phase coating with intrinsic quasi plasticity and improvement in reliability. The present study provides useful inspirations on the optimization of spraying parameters and design of advanced EBC systems.
KeywordEnvironmental barrier coating Atmospheric plasma spray Ytterbium disilicate Phase evolution Transmission electron microscopy
Funding OrganizationNational Science and Technology Major Project ; International Cooperation Key Program ; Key Research Program of the Chinese Academy of Sciences ; Natural Science Foundation of China ; Nat-ural Science Foundation of Liaoning Province ; LiaoNing Revitalization Talents Program
DOI10.1016/j.surfcoat.2022.128373
Indexed BySCI
Language英语
Funding ProjectNational Science and Technology Major Project[2017-VI-0020-0093] ; International Cooperation Key Program[174321KYSB20180008] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-2-2] ; Natural Science Foundation of China[51772302] ; Nat-ural Science Foundation of Liaoning Province[2020-MS-006] ; LiaoNing Revitalization Talents Program[XLYC2002018]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Coatings & Films ; Physics, Applied
WOS IDWOS:000793343300005
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173972
Collection中国科学院金属研究所
Corresponding AuthorZhang, Jie
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Wang, Haoyu,Zhang, Jie,Sun, Luchao,et al. Microstructure and phase composition evolution of dual-phase ytterbium silicate coatings plasma sprayed from stoichiometric Yb2Si2O7 feedstock powder[J]. SURFACE & COATINGS TECHNOLOGY,2022,437:10.
APA Wang, Haoyu,Zhang, Jie,Sun, Luchao,&Wang, Jingyang.(2022).Microstructure and phase composition evolution of dual-phase ytterbium silicate coatings plasma sprayed from stoichiometric Yb2Si2O7 feedstock powder.SURFACE & COATINGS TECHNOLOGY,437,10.
MLA Wang, Haoyu,et al."Microstructure and phase composition evolution of dual-phase ytterbium silicate coatings plasma sprayed from stoichiometric Yb2Si2O7 feedstock powder".SURFACE & COATINGS TECHNOLOGY 437(2022):10.
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