A General Model for Solutes Activity Interaction Parameters in Dilute Metallic Solutions

Abstract

Several models had been proposed to estimate the activity interaction parameters in a dilute metallic solution from the physical parameters of constituent elements. However, these models either need to choose an asymmetric component or do not satisfy by themselves the basic requirement of the reciprocal relation, i.e., ε_i^j = ε_jⁱ. As a result, their practical applications are greatly limited. In this paper, a general model, which doesn’t need to choose an asymmetric component but satisfies the basic requirement of the reciprocal relation, is introduced. The applicability of the new model is tested in ferrous alloy systems and non-ferroalloy systems. The results are better than those from the previous model with less deviations from experimental data.