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

被引：221

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
Abe, E
Kawamura, Y
Hayashi, K
Inoue, A
[J]. ACTA MATERIALIA, 2002, 50 (15) : 3845 - 3857
[2] ABE E, 2006, P 16 INT C MICR IMC1, P1701
[3] Long-period hexagonal structures in melt-spun Mg97Ln2Zn1 (Ln=lanthanide metal) alloys
Amiya, K
Ohsuna, T
Inoue, A
[J]. MATERIALS TRANSACTIONS, 2003, 44 (10) : 2151 - 2156
[4] EGUSA D, ARXIV11074602V1
[5] Microstructure and plastic deformation behavior of Ni3(Ti,X) (X = Nb,Al) single crystals with long-period geometrically closely packed crystal structures
Hagihara, K.
Tanaka, T.
Fujimoto, H.
Nakano, T.
Umakoshi, Y.
[J]. INTERMETALLICS, 2006, 14 (10-11) : 1332 - 1338
[6] Effect of long-period stacking ordered phase on mechanical properties of Mg97Zn1Y2 extruded alloy
Hagihara, K.
Kinoshita, A.
Sugino, Y.
Yamasaki, M.
Kawamura, Y.
Yasuda, H. Y.
Umakoshi, Y.
[J]. ACTA MATERIALIA, 2010, 58 (19) : 6282 - 6293
[7] Novel hexagonal structure and ultrahigh strength of magnesium solid solution in the Mg-Zn-Y system
Inoue, A
Kawamura, Y
Matsushita, M
Hayashi, K
Koike, J
[J]. JOURNAL OF MATERIALS RESEARCH, 2001, 16 (07) : 1894 - 1900
[8] Long period stacking structures observed inMg97Zn1Y2 alloy
Itoi, T
Seimiya, T
Kawamura, Y
Hirohashi, M
[J]. SCRIPTA MATERIALIA, 2004, 51 (02) : 107 - 111
[9] PRESSURE-INDUCED CHANGE IN LONG-PERIOD STACKING SEQUENCE OF CLOSE-PACKED LAYERS IN MG3IN
IWASAKI, H
WATANABE, Y
OGAWA, S
[J]. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1974, 7 (DEC1) : 611 - 615
[10] Formation and mechanical properties of Mg97Zn1RE2 alloys with long-period stacking ordered structure
Kawamura, Yoshihito
Yamasaki, Michiaki
[J]. MATERIALS TRANSACTIONS, 2007, 48 (11) : 2986 - 2992

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