New polytypes of LPSO structures in an Mg-Co-Y alloy
Jin, Q. Q.1,2; Shao, X. H.1; Hu, X. B.1,3; Peng, Z. Z.1,2; Ma, X. L.1
Corresponding AuthorMa, X. L.(
AbstractThe magnesium alloys containing long-period stacking ordered (LPSO) structures exhibit excellent mechanical properties. Each LPSO structure is known to contain either ABCA or ABC building block and feature its own stacking sequences. By atomic-scale high-angle annular dark field scanning transmission electron microscopy, we find the co-existence of ABCA and ABC building block in a single LPSO structure of the as-cast Mg92Co2Y6 (at.%) alloy, leading to the formation of six new polytypes of the LPSO structures determined as 29H, 51R, 60H, 72R, 102R and 192R. The lattice parameter of each LPSO structure is derived as a(LPSO) =a(Mg) = 0.321 nm and c(LPSO) = 1/2n x c(Mg) (n presents the number of basal layers in a unit cell). The stacking sequences and the space groups of these newly identified LPSO structures are proposed based on the electron diffraction and atomic-scale aberration-corrected high-resolution images. A random distribution of Co/Y elements in the basal planes of ABCA and ABC structural units is also observed and discussed.
KeywordMagnesium alloys long-period stacking ordered (LPSO) structure scanning transmission electron microscopy electron diffraction
Funding OrganizationNational Science Foundation of China ; Innovation Fund of IMR ; Youth Fund of SYNL fund
Indexed BySCI
Funding ProjectNational Science Foundation of China[51301177] ; Innovation Fund of IMR[SCJJ-2013-PY-08] ; Innovation Fund of IMR[2015-PY08] ; Youth Fund of SYNL fund[2015FP18]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000390644600001
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Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorMa, X. L.
Affiliation1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei, Peoples R China
3.Japan Fine Ceram Ctr, Nanostruct Res Lab, Nagoya, Aichi 4568587, Japan
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Jin, Q. Q.,Shao, X. H.,Hu, X. B.,et al. New polytypes of LPSO structures in an Mg-Co-Y alloy[J]. PHILOSOPHICAL MAGAZINE,2017,97(1):1-16.
APA Jin, Q. Q.,Shao, X. H.,Hu, X. B.,Peng, Z. Z.,&Ma, X. L..(2017).New polytypes of LPSO structures in an Mg-Co-Y alloy.PHILOSOPHICAL MAGAZINE,97(1),1-16.
MLA Jin, Q. Q.,et al."New polytypes of LPSO structures in an Mg-Co-Y alloy".PHILOSOPHICAL MAGAZINE 97.1(2017):1-16.
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