Abstract
A general formulation of cluster methods applied to calculations of thermodynamic quantities of alloys in terms of renormalizing fields describing interaction between a cluster and its environment is given. We have shown that the well-known cluster variation method and the cluster field method, which was suggested earlier, are special cases of our approach. These methods have been used in calculations of phase diagrams of fcc alloys with L12 and L10 ordering transitions with several realistic interaction models. It turns out that, for all these models, the simple tetrahedron version of the cluster field method suggested in this paper describes the phase diagrams almost as accurately as more complicated cluster variation techniques. Possible applications of the tetrahedron version of the cluster field method to inhomogeneous states and kinetics of phase transitions in fcc alloys are discussed.
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Zh. Éksp. Teor. Fiz. 115, 158–179 (January 1999)
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Vaks, V.G., Samolyuk, G.D. On accuracy of different cluster models used in describing ordering phase transitions in fcc alloys. J. Exp. Theor. Phys. 88, 89–100 (1999). https://doi.org/10.1134/1.558769
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DOI: https://doi.org/10.1134/1.558769