Thermodynamic assessment of the C–Nb–V ternary system over the whole composition and temperature ranges

Abstract Based on critical evaluation of the literature data, the C–Nb–V system has been reviewed and assessed by means of the CALPHAD technique. There is no ternary compound in this system. The individual phases, i.e., liquid, fcc, hcp and bcc, have been modeled. The modeling covers the whole compositional range of this system and the temperature range from 1400 to 3310 °C. The C–V system is minor revised and combined with the description of the C–Nb and Nb–V systems to model the C–Nb–V ternary system. A set of self-consistent thermodynamic parameters for the C–Nb–V system is systematically optimized. Comprehensive comparisons between the calculated and reported phase diagram and thermodynamic data show that the reliable information is satisfactorily accounted for by the present modeling. The liquidus projection and reaction scheme of the C–Nb–V system are also generated by using the present thermodynamic parameters.