Abstract
Thermodynamic and structural properties of coherent interphase boundaries (IPBs) in the Al-Li and Ag-Al alloy systems are studied using the cluster variation method (CVM) and low-temperature expansion (LTE) techniques. The energy parameters required as input for the CVM and LTE calculations were obtained by fitting to phase diagram data in the case of Al-Li alloys and from a fit to the results of first-principles total energy calculations for Ag-Al. Interphase energies are calculated as a function of temperature and composition profiles across coherent IPBs are computed for high-symmetry crystallographic orientations. It is demonstrated that the calculated temperature dependence of interphase energies and the “widths” associated with compositionally diffuse IPBs can be appreciable even at temperatures well away from critical points.
Similar content being viewed by others
References
J. W. Cahn and J. E. Hilliard, J. Chem. Phys. 28, 258 (1958).
J. W. Cahn and J. E. Hilliard, J. Chem. Phys. 31, 688 (1959).
A. J. McAlister, Bulletin of Alloy Phase Diagrams 8, 526 (1987).
R. Kikuchi, Phys. Rev. 81, 998 (1951).
J. M. Sanchez and D. de Fontaine, Phys. Rev. B 17, 2926 (1978); 21, 216 (1980); 25, 1759 (1982); J. M. Sanchez, F. Ducastelle and D. Gratias, Physica 128A, 334 (1984).
G. Parisi, Statistical Field Theory (Addison-Wesley, Menlo Park, CA, 1988).
Garland and Sanchez
J. W. Cahn, in Interfacial Segregation, edited by W. C. Johnson and J. M. Blakely (ASM, Metals Park, Ohio, 1977).
M. Asta, to appear in the proceedings of the International Workshop on the Theory and Application of the Cluster and Path Probability Methods (Plenum, New York).
C. Sigli and J. M. Sanchez, Acta metall. 34, 1021 (1986).
D. de Fontaine, Solid State Physics 47, 33 (1994).
M. Asta and D. D. Johnson, unpublished.
O. K. Andersen, O. Jepsen and M. Sob, in Electronic Band Structure and its Applications, edited by M. Yussouff (Springer Lecture Notes, 1987).
J. J. Hoyt and S. Spooner, Acta, metall. 39, 689 (1991).
S. F. Bauman and D. B. Williams, Scripta metall. 18, 611 (1984).
A. J. Ardell, in Phase Transformations ‘87, edited by G. W. Lorimer (Institute of Metals, London, 1988).
Y. W. Lee and H. I. Aaronson, Acta Metall. 28, 539 (1980).
K. B. Alexander, et al., Acta Metall. 32, 2241 (1984).
Ph. A. Dubey, B. Schonfeld, and G. Kostorz, Acta Metall. 39, 1161 (1991).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Asta, M. Thermodynamic Properties of Coherent Interphase Boundaries in Substitutional Fcc Alloys. MRS Online Proceedings Library 398, 281–286 (1995). https://doi.org/10.1557/PROC-398-281
Published:
Issue Date:
DOI: https://doi.org/10.1557/PROC-398-281