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Two-Dimensional Antiphase Structure in The Ordered Ternary Alloy Cu-Zn-Au

Published online by Cambridge University Press:  21 February 2011

D. Watanabe ,
K. Sato  and
R. Miida
D. Watanabe
Affiliation:
Department of Physics, Faculty of Science, Tohoku University, Sendai 980, Japan;
K. Sato
Affiliation:
Now at Nippon Kokan K.K., Technical Research Center, Kawasaki-Ku, Kawasaki 210, Japan.
R. Miida
Affiliation:
Department of Physics, Faculty of Science, Tohoku University, Sendai 980, Japan;
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Abstract

Ordered structures of Cu-Zn-Au alloys were studied by electron diffraction. Two-dimensional antiphase structures exist at the compositions, Cu55Zn15Au30, Cu80-xZnxAu20 (10 ≤ x ≤ 35) and Cu85-xZnxAu15(25 ≤ x ≤ 35). The domain sizes M's measured in terms of the basic L12 cell along the two orthogonal directions are always the same, and they change from 3.4 to 1.6 as Zn content increases from 10 to 35 at.%. Based on the superstructure image of the Cu55Zn25Au20 with M=2.0 taken with high-resolution electron microscope, a structure model is derived, which explains intensities of all the superlattice spots on the diffraction pattern.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 21: Symposium GREECE – Phase Transformations in Solids , 1983 , 241
Copyright
Copyright © Materials Research Society 1984

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References

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