Intergrowth structure of Laves within mu phases in Co-Al-W base superalloy

doi:10.1016/j.jallcom.2020.155822

IMR OpenIR

	Intergrowth structure of Laves within mu phases in Co-Al-W base superalloy
	Liu, L. R.1; Zhou, B. X.1; Wang, Q. F.2; Yang, Y. H.3; Yu, J. J.3; Sun, B. Z.2
通讯作者	Sun, B. Z.(bzsun@imp.neu.edu.cn)
	2020-12-05
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	844 页码:8
摘要	In a Co-Al-W base superalloy, two types of topologically close-packed (TCP) phases, mu and Laves phases, were investigated by high-resolution transmission electron microscopy, scanning transmission electron microscopy and energy dispersive X-ray spectroscopy. It is found that an intergrowth structure of Laves within m phases can be formed and both have a completely coherent interface relationship. With the aid of image simulation, both mu and Laves phases are identified as the quaternary compounds containing Co, Cr, W and Mo. Compared to Co7W6-type mu phase, W1 and W3-sites are the preferred sites of substitution by Mo atoms and Co1-site is a preferred site of substitution by Cr atoms in the quaternary mu phase, leading to the atomic displacement and an alteration of lattice parameter. In contrast to Co2W-type Laves phase, the newly formed quaternary Laves phase can maintain the C14-type Laves structure although Co and W are substituted partially by Cr and Mo respectively. (C) 2020 Elsevier B.V. All rights reserved.
关键词	Co-Al-W base Superalloy Topologically close-packed phases Intergrowth Quaternary compounds Substitution
资助者	National Natural Science Foundation of China
DOI	10.1016/j.jallcom.2020.155822
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51701210]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000560367000008
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/140194
专题	中国科学院金属研究所
通讯作者	Sun, B. Z.
作者单位	1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China 2.Northeastern Univ, Inst Mat, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Dept Superalloys, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Liu, L. R.,Zhou, B. X.,Wang, Q. F.,et al. Intergrowth structure of Laves within mu phases in Co-Al-W base superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,844:8.
APA	Liu, L. R.,Zhou, B. X.,Wang, Q. F.,Yang, Y. H.,Yu, J. J.,&Sun, B. Z..(2020).Intergrowth structure of Laves within mu phases in Co-Al-W base superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,844,8.
MLA	Liu, L. R.,et al."Intergrowth structure of Laves within mu phases in Co-Al-W base superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 844(2020):8.