Polytypes of long-period stacking structures synchronized with chemical order in a dilute Mg–Zn–Y alloy

By Eiji Abe, A. Ono, Takaomi Itoi, M. Yamasaki, Yoshihito Kawamura. 2011

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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.

Subfields: Biomaterials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/5221dcd99656ef1bc8c0ef3c5d20d0e15e42e54d