The phase equilibria of the Ni-Co-M1 (M1 = Re, Ru) and Ni-Re-M2 (M2 = W, Ta) ternary systems were thermodynamically assessed by the CALPHAD (CALculation of PHAse Diagrams) method based on the thermodynamic descriptions of the constitutive binary systems and experimental phase equilibria data available in the literature. The solution phases, i.e., fcc(Co, Ni), hcp(Co, Re, Ru) and bcc(Co, W, Ta), were described using substitutional solution model and the binary phases σ(ReW), χ(Re₃W), χ(Re₃Ta), NiTa₂, μ(NiTa), Ni₂Ta and Ni₃Ta with the solubilities of the third element were modeled by the sublattice models. A set of self-consistent thermodynamic parameters for each ternary system was finally obtained. Some representative isothermal sections and liquidus projections were calculated. Comparisons between the calculated results and experimental data show that almost all the reliable experimental data were satisfactorily reproduced by the present modeling.

Ni-Co-M1 (M1 = Re, Ru) 和 Ni-Re-M2 (M2 = W, Ta) 三元体系的相平衡通过基于热力学描述的 CALPHAD（PHAse 图计算）方法进行热力学评估文献中可用的本构二元系统和实验相平衡数据。溶液相，即fcc(Co, Ni)、hcp(Co, Re, Ru) 和 bcc(Co, W, Ta)，使用置换溶液模型和二元相 σ(ReW), χ(Re ₃ W)、χ(Re ₃ Ta)、NiTa ₂、μ(NiTa)、Ni ₂ Ta 和 Ni ₃具有第三种元素溶解度的 Ta 由亚晶格模型模拟。最终得到了每个三元系统的一组自洽热力学参数。计算了一些有代表性的等温截面和液相线预测。计算结果与实验数据的比较表明，几乎所有可靠的实验数据都被本模型满意地再现。