Journal
PHILOSOPHICAL MAGAZINE LETTERS
Volume 91, Issue 10, Pages 690-696Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500839.2011.609149
Keywords
electron microscopy; magnesium alloys; crystal structure; long-period order
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT)
- JST
- Grants-in-Aid for Scientific Research [23246122] Funding Source: KAKEN
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A series of structural polytypes formed in an Mg-1 at.% Zn-2 at.% Y alloy has been identified, which are reasonably viewed as long-period stacking derivatives of the hexagonal-close-packed Mg structure with alternate AB stacking of the close-packed atomic layers. Atomic-resolution Z-contrast imaging clearly revealed that the structures are long-period chemical-ordered as well as stacking-ordered; unique chemical order along the stacking direction occurs as being synchronized with a local faulted stacking of AB'C'A, where B' and C' layers are commonly enriched by Zn/Y atoms.
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