Xue-min Yang . Jin-yan Li . Fang-jia Yan . Dong-ping Duan . Jian Zhang
. 2017, 24(11): 181-199.
Raoultian activity coefficients γ0C of C in infinitely dilute Fe–C binary melts at temperatures of 1833, 1873, 1923, and 1973 K have been determined from the converted mass action concentrations N’C of C in Fe–C binary melts by the developed AMCT-Ni model based on the atom–molecule coexistence theory (AMCT). The obtained expression of γ0C by the developed AMCT-Ni model has been evaluated to be accurate based on the reported ones from the literature. Meanwhile, three activity coefficients γC, f%,C, and fH,C of C coupled with activity aR,C or a%,C or aH,C have been obtained by the developed AMCT-Ni model and assessed through comparing with the predicted ones by other models from the literature. The first-order activity interaction coefficients εCC, eCC, and hCC related to γC, f%,C, and fH,C are also determined and assessed in comparison with the reported ones from the literature. Furthermore, the integral molar mixing thermodynamic functions such as ΔmixHm,Fe-C, ΔmixSm,Fe-C, and ΔmixGm,Fe-C of Fe–C binary melts over a temperature range from 1833 to 1973 K have been determined and evaluated to be valid based on the determined ones from the literature.
