Thermodynamic Properties of Mn-C Melts

Carbon solubility in Mn-Fe melts (XMn = 0. 161 — 0. 706, XFe = 0. 034 — 0. 633) was measured experimentally at various temperatures. By thermodynamic derivation and calculation, the relationship between activity coefficient of carbon in infinite dilute solution of manganese in Mn-C system and temperature was obtained. Using Gibbs-Duhem relationship, the experimental results of this study, and experimental data reported in references, the relationship between other thermodynamic properties in Mn-C system and temperature were obtained by thermodynamic derivation and calculation.