Thermodynamic Assessment of Liquid Mn-Fe-C System by Unified Interaction Parameter Model

摘要

The present study assesses the available experimental data and proposes a model based on the Unified Interaction Parameter Formalism to describe the solution properties of the Mn-Fe-C system. The experimental information developed from the recent works by Katsnelson et al., Fenstad, and Kim et al. defines the solution properties as the ratio of the activity of C to Mn in the Mn-Fe-C system. These data were used to determine the activity coefficient of carbon at infinite dilute solution of Mn in the Mn-C system at various temperatures. In γ_C~°(Mn)=0.32-2 679/T(K) (1628-1773 K) A determination of the individual activity of C and Mn from experimental data requires additional information. As it meets the necessary condition for the task by virtue of satisfying the Gibbs-Duhem relationship, the Unified Interaction Parameter (UIP) model was correlated with the experimental data of the Mn-Fe-C system. The interaction parameters of the UIP model were determined by multiple regression analysis of the correlated equations.