A detailed study of the Cu-Au system between 25–50 at. % Au was made to determine the range of stability of the long period superlattices found in this system. The single-crystal thin film technique was used to make the samples, and the structure was determined using electron diffraction. It was found that a one-dimensional long period superlattice exists as an equilibrium phase from about 30% Au, substantiating Scott's original observation, to 60% Au. From about 30% to 38% Au, the antiphase structure is the Cu3Au II type, while at higher Au content, the structure is the CuAu II type. The domain size M was found to decrease continuously from a value of about 10 at 30% Au to 5 at 50% Au, regardless of the change in structure when crossing the phase region between Cu3Au and CuAu. Small amounts of Al added to a sample having the CuAu II structure and an Au content of 40%, decreased the domain size in a manner identical to that observed for stoichiometric CuAu II. The addition of Al to a sample having an Au c...
[1]
H. Sato,et al.
Long-Period Superlattices in Alloys. II
,
1962
.
[2]
H. Sato,et al.
Fermi Surface of Alloys
,
1962
.
[3]
R. S. Toth,et al.
Effect of Additional Elements on the Period of CuAu II and the Origin of the Long-Period Superlattice
,
1961
.
[4]
R. E. Scott.
New Complex Phase in the Copper‐Gold System
,
1960
.
[5]
M. Hansen,et al.
Constitution of Binary Alloys
,
1958
.
[6]
D. Watanabe,et al.
On the Superstructure of the Ordered Alloy Cu3Pd I. Electron Diffraction Study
,
1956
.
[7]
A. Guinier,et al.
Étude de la formation de l’ordre dans les solutions solides Or-Cuivre Au-Cu3
,
1948
.
[8]
F. C. Nix,et al.
A Dilatometric Study of the Order-Disorder Transformation in Cu-Au Alloys
,
1941
.