Microstructure and phase composition evolution of dual-phase ytterbium silicate coatings plasma sprayed from stoichiometric Yb2Si2O7 feedstock powder

doi:10.1016/j.surfcoat.2022.128373

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	Microstructure and phase composition evolution of dual-phase ytterbium silicate coatings plasma sprayed from stoichiometric Yb2Si2O7 feedstock powder
	Wang, Haoyu 1,2; Zhang, Jie 2; Sun, Luchao 2; Wang, Jingyang 2
刊名	SURFACE & COATINGS TECHNOLOGY
	2022-05-15
卷号	437 页码:10
关键词	Environmental barrier coating Atmospheric plasma spray Ytterbium disilicate Phase evolution Transmission electron microscopy
ISSN号	0257-8972
DOI	10.1016/j.surfcoat.2022.128373
通讯作者	Zhang, Jie(jiezhang@imr.ac.cn)
英文摘要	The 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.
资助项目	National 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研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000793343300005
资助机构	National 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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173971]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Jie
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 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.