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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
Corresponding AuthorSun, B. Z.(bzsun@imp.neu.edu.cn)
2020-12-05
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume844Pages:8
AbstractIn 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.
KeywordCo-Al-W base Superalloy Topologically close-packed phases Intergrowth Quaternary compounds Substitution
Funding OrganizationNational Natural Science Foundation of China
DOI10.1016/j.jallcom.2020.155822
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51701210]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000560367000008
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140194
Collection中国科学院金属研究所
Corresponding AuthorSun, B. Z.
Affiliation1.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
Recommended Citation
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.
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