In this work, the Co-Cr-Nb ternary system was evaluated using the CALPHAD technique based on the experimental measurements of the isothermal sections at 1000, 1100 and 1200 °C. The solution phases including Liquid, Bcc, Fcc and Hcp were described by a substitutional solution model. The Laves phases were described by a two-sublattice model. The σ phase was described by a three-sublattice model of (Co,Nb)₈Cr₄(Co,Cr,Nb)₁₈ and the μ phase was described by a four-sublattice model of Co₁₍Co,Cr,Nb)₂(Nb)₄(Co,Cr,Nb)₆. The Co₇Nb₂ was treated as a stoichiometric compound. A set of self-consistent thermodynamic parameters for the Gibbs energies of individual phase in the Co-Cr-Nb system has been obtained which leads to a great fit between calculated results and experimented data. The calculated liquidus projection and reaction scheme of the Co-Cr-Nb ternary system have also been presented.

在这项工作中，使用CALPHAD技术基于在1000、1100和1200°C下等温截面的实验测量值对Co-Cr-Nb三元体系进行了评估。通过替代溶液模型描述了溶液阶段，包括液相，密件抄送，FCC和Hcp。Laves相用两个子格模型描述。σ相由（Co，Nb）₈ Cr ₄（Co，Cr，Nb）₁₈的三子晶格模型描述，μ相由Co _1（ Co，Cr，Nb）的四子晶格模型描述₂（Nb）₄（Co，Cr，Nb）₆。Co ₇ Nb ₂被视为化学计量的化合物。已经获得了一组用于Co-Cr-Nb系统中各个相的吉布斯能量的自洽热力学参数，这使得计算结果与实验数据非常吻合。还提出了计算出的Co-Cr-Nb三元体系的液相线预测值和反应方案。