Abstract
The thermodynamic modeling of the ternary system C-Cr-Zr has been obtained by modeling the Gibbs energy of all individual phases using the CALPHAD (CALculation of PHAse Diagrams) approach. There is no ternary compound in this system. The liquid is modeled as a substitutional solution phase, while the solid solution phases including ZrC, (αZr), (βCr), (βZr), Cr3C2, Cr7C3, Cr23C6, C14, C15 and C36 are described by sublattice models. The modeling covers the whole composition and temperature ranges. A set of self-consistent thermodynamic parameters for the C-Cr-Zr system is obtained by considering the phase diagram data in the ternary system. Comprehensive comparisons between the calculated and measured phase diagram and thermodynamic data show that the experimental information is satisfactorily accounted for by the present thermodynamic description. The liquidus projection and reaction scheme of the C-Cr-Zr system are also presented.
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