Short-Range Order and Correlation Effects in Solid Solutions

Abstract

The results of statistical theory in quasichemical approximation of long- and short-range atomic ordering in ternary substitutional solid solutions AB₃ + C with a face-centered cubic (FCC) lattice L1₂ of a Cu₃Au type suggesting that atoms C are arranged in the sites of both types legal for atoms A and B are given. For particular cases, the formulas of the parameters characterizing short-range ordering depending on the temperature, the alloy composition, the degree of long-range order, and the energy constants are given. The character of their functional dependences is determined, the graphs are constructed. The calculation results correlate with the experimental data published.