A calorimetric study of aluminium–zinc alloys containing up to 60 at.-% Zn has yielded values of the enthalpy of formation that compare well with those of previous work by Wittig and Schöffl (Z. Metallkunde, 1960, 51, 700). Trends in composition and temperature coefficients are also in good agreement. It is suggested that values of the enthalpy of mixing in both studies are more consistent with a previously proposed modification to the phase diagram than are those obtained from emf studies. Excess entropies of mixing have been calculated by combining the enthalpies obtained by calorimetry with the excess free energies from the emf measurements.
Get full access to this article
View all access options for this article.
References
1.
WittigF. E. and SchöfflL., Z. Metallkunde, 1960, 51, 700.
2.
HultgrenR., OrrR. L., and KelleyK. K., ‘Supplement to Selected Values of Thermodynamic Properties of Metals and Alloys’, Lawrence Radiation Lab., Univ. California, Berkley, USA (to be published).
3.
HilliardJ. E., AverbachB. L., and CohenM., Acta Met., 1954, 2,621.
4.
CorsepiusH. and MunsterA., Z. physikal. Chem., 1959, 22, 1.
5.
BlairG. R. and DownieD. B., Metal Sci. J., 1970,4, 1.
6.
ConnellR. A., PhD Thesis, Univ. Strathclyde,1971.
7.
WittigF. E. and HuberF., Z. Elektrochem., 1959, 63, 994.
8.
OrrR. L. and RovelJ., Acta Met., 1962, 10, 935.
9.
ElliottR. P., ‘Constitution of Binary Alloys: First Supplement’1965: New York and London(McGraw-Hill).
10.
ShunkF. A., ‘Constitution of Binary Alloys: Second Supplement’.1969: New York and London(McGraw-Hill).
11.
PresnyakovA. A., Yu. A. Gorban, and V. V. Chervyakova, Zhur. Fiz. Khim., 1961, 35, (6), 1289.
12.
GoldakG. R. and ParrJ. G., J. Inst. Metals, 1963 –64, 92, 230.
13.
HansenM. and AnderkoK., ‘Constitution of Binary Alloys’.1958: New York and London(McGraw-Hill).
