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Based on critical evaluation of the experimental phase diagram data of the Co-Cr-Ti ternary system,a thermodynamic modeling of this ternary system was conducted by using the CALPHAD technique.One single function was used to describe the Gibbs energies of both the ordered and disordered phases such as L12/fcc_A1 and B2/bcc_A2.A set of self-consistent thermodynamic parameters for the Gibbs energies of individual phases in the Co-Cr-Ti system was obtained.