Microstructure and composition evolution of a single-crystal superalloy caused by elements interdiffusion with an overlay NiCrAlY coating on oxidation

doi:10.1016/j.jmst.2019.11.017

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	Microstructure and composition evolution of a single-crystal superalloy caused by elements interdiffusion with an overlay NiCrAlY coating on oxidation
	Yang, Lanlan 1; Chen, Minghui 2; Wang, Jinlong 2; Qiao, Yanxin 1; Guo, Pingyi 1; Zhu, Shenglong 3; Wang, Fuhui 2
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2020-05-15
卷号	45 页码:49-58
关键词	Single-crystal superalloys NiCrAlY coating High-temperature oxidation Arc ion plating Elements interdiffusion Microstructure
ISSN号	1005-0302
DOI	10.1016/j.jmst.2019.11.017
通讯作者	Chen, Minghui(mhchen@mail.neu.edu.cn)
英文摘要	MCrAlY (M=Ni and/or Co) overlay coating is widely used as a protective coating against high temperature oxidation and corrosion. However, due to its big difference in chemical composition with the underlying superalloy, elements interdiffusion occurs inevitably. One of the direct results is the formation of interdiffusion zone (IDZ) and secondary reaction zone (SRZ) with a high density of fine topological closed-packed phases (TCPs), weakening dramatically the mechanical properties of the alloy substrate. It is by now the main problem of modern high-temperature metallic coatings, but there are still hardly any reports studying the formation, growth and transformation of IDZ and SRZ in deep, as well as the precipitation of TCPs. In this work, a typical NiCrAlY coating is deposited by arc ion plating on a single-crystal superalloy N5. Elements interdiffusion between them and its relationship on microstructure were clarified. Cr rather than Al from the coating diffuses into the alloy at high temperatures and segregates immediately beneath their interface, contributing largely to the formation of IDZ. Simultaneously, diffusion of Ni from the deep alloy to IDZ leads to the formation and continuous expansion of SRZ. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	National Natural Science Foundation of China[51671053] ; National Natural Science Foundation of China[51801021] ; Ministry of Industry and Information Technology Project[MJ-2017-J-99]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000526956200006
资助机构	National Natural Science Foundation of China ; Ministry of Industry and Information Technology Project
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/138543]
专题	金属研究所_中国科学院金属研究所
通讯作者	Chen, Minghui
作者单位	1.Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China 2.Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yang, Lanlan,Chen, Minghui,Wang, Jinlong,et al. Microstructure and composition evolution of a single-crystal superalloy caused by elements interdiffusion with an overlay NiCrAlY coating on oxidation[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,45:49-58.
APA	Yang, Lanlan.,Chen, Minghui.,Wang, Jinlong.,Qiao, Yanxin.,Guo, Pingyi.,...&Wang, Fuhui.(2020).Microstructure and composition evolution of a single-crystal superalloy caused by elements interdiffusion with an overlay NiCrAlY coating on oxidation.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,45,49-58.
MLA	Yang, Lanlan,et al."Microstructure and composition evolution of a single-crystal superalloy caused by elements interdiffusion with an overlay NiCrAlY coating on oxidation".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 45(2020):49-58.