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

被引：227

作者：

Abe, E. ^{[1
]}

Ono, A. ^{[1
]}

Itoi, T. ^{[2
]}

Yamasaki, M. ^{[3
]}

Kawamura, Y. ^{[3
]}

机构：

[1] Univ Tokyo, Dept Mat Sci & Engn, Tokyo 1138656, Japan

[2] Chiba Univ, Dept Mech Engn, Chiba 2638522, Japan

[3] Kumamoto Univ, Dept Mat Sci & Engn, Kumamoto 8608555, Japan

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2011年 / 91卷 / 10期

关键词：

electron microscopy; magnesium alloys; crystal structure; long-period order; SOLIDIFIED MG97ZN1Y2 ALLOY; MECHANICAL-PROPERTIES; MICROSTRUCTURE; STRENGTH;

D O I：

10.1080/09500839.2011.609149

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：690 / 696

页数：7

共 16 条

[1] Long-period ordered structure in a high-strength nanocrystalline Mg-1 at% Zn-2 at% Y alloy studied by atomic-resolution Z-contrast STEM [J].