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Structure Analysis of a Long Period Stacking Ordered Phase in Mg-Al-Gd Alloys

Published online by Cambridge University Press:  18 January 2011

Hideyuki Yokobayashi ,
Kyosuke Kishida ,
Haruyuki Inui ,
Michiaki Yamasaki  and
Yoshihito Kawamura
Hideyuki Yokobayashi
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, 606-8501 JAPAN
Kyosuke Kishida
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, 606-8501 JAPAN
Haruyuki Inui
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto, 606-8501 JAPAN
Michiaki Yamasaki
Affiliation:
Department of Materials Science, Kumamoto University 2-39-1, Kurokami, Kumamoto 860-8555, Japan
Yoshihito Kawamura
Affiliation:
Department of Materials Science, Kumamoto University 2-39-1, Kurokami, Kumamoto 860-8555, Japan
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Abstract

Crystal structure of a long period stacking ordered (LPSO) phase newly found in Mg-Al-Gd ternary alloys was investigated by scanning transmission electron microscopy (STEM) and transmission electron microscopy (TEM). The Mg-Al-Gd LPSO phase was confirmed to be constructed with 6-layer structural blocks, which is similar to the case of the 18R-type LPSO phases in the other Mg-TM-RE alloys. Atomic resolution high-angle annular dark-field (HAADF) STEM imaging revealed that Gd atoms are enriched in four layers instead of two layers and are ordered in a long range within the 6-layer structural block.

Keywords

Mgscanning transmission electron microscopy (STEM)crystallographic structure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1295: Symposium N – Intermetallic-Based Alloys for Structural and Functional Applications , 2011 , mrsf10-1295-n05-38
Copyright
Copyright © Materials Research Society 2011

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References

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