Melting enthalpy and entropy of binary systems of alloys of 3d transition VII and VIII metals and carbon: Thermodynamic calculation and experimental study
Vz. Turkevich, Melting enthalpy and entropy of binary systems of alloys of 3d transition VII and VIII metals and carbon: Thermodynamic calculation and experimental study, INT J THERM, 20(1), 1999, pp. 333-341
Thermodynamic calculations have been performed of the melting enthalpy and
entropy of the Co C, Ni-C,and Fe-C binary system alloys having eutectic com
positions and of alloys whose compositions correspond to the minimum temper
atures of the Mn C, Fe-Co, Fe-Ni, and Mn Ni melting diagrams. fleet capacit
ies of one- and two-phase alloys of investigated systems have also been cal
culated as a function of temperature. In order to express a dependence of t
he Gibbs energy (G) of the liquid phase on the composition, the model of re
gular solutions has been used. The relation between the G of interstitial s
olid solutions and concentration was described by the two-sublattice model.
The values have been experimentally verified using a high temperature calo
rimeter. These results have shown that the discrepancy bt tween experimenta
l and calculated results is within the calorimetric measurement uncertainty
and does not exceed 10%.