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Atomic structure and enhanced thermostability of a new structure MgYZn4 formed by ordered substitution of Y for Mg in MgZn2 in a Mg-Zn-Y alloy
Zhang, Lifeng; Ma, Shangyi; Wang, Weizhen; Yang, Zhiqing; Ye, Hengqiang
2019-09-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume35Issue:9Pages:2058-2063
AbstractA new phase MgYZn4 in Mg-Zn-Y alloy was studied using aberration-corrected scanning-transmission electron microscopy and first-principles calculations. Nanometer-sized MgYZn4 precipitates were formed through ordered substitutions of Y with 50% Mg atoms in MgZn2. MgYZn4 has an orthorhombic structure with a space group of Pmnn, and lattice parameters a =5.2965 angstrom, b =9.4886 angstrom, and c =8.5966 angstrom. Importantly, both size and structure of MgYZn4 are stable at 625 K for 5 h, showing higher thermostability than MgZn2, which should be important for applications at elevated temperatures. The enhanced thermostability of MgYZn4 is attributed to the lower formation energy and bonding enhancement due to Y substitution. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordMgYZn4 Thermostability Laves phase Precipitate Mg alloys
Indexed BySCI
Language英语
WOS IDWOS:000475870600032
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80811
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhang, Lifeng,Ma, Shangyi,Wang, Weizhen,et al. Atomic structure and enhanced thermostability of a new structure MgYZn4 formed by ordered substitution of Y for Mg in MgZn2 in a Mg-Zn-Y alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(9):2058-2063.
APA Zhang, Lifeng,Ma, Shangyi,Wang, Weizhen,Yang, Zhiqing,&Ye, Hengqiang.(2019).Atomic structure and enhanced thermostability of a new structure MgYZn4 formed by ordered substitution of Y for Mg in MgZn2 in a Mg-Zn-Y alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(9),2058-2063.
MLA Zhang, Lifeng,et al."Atomic structure and enhanced thermostability of a new structure MgYZn4 formed by ordered substitution of Y for Mg in MgZn2 in a Mg-Zn-Y alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.9(2019):2058-2063.
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