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Thermodynamic Modeling of the C-Co-Mo and C-Mo-Ni Ternary Systems

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Abstract

The C-Co-Mo and C-Mo-Ni systems were assessed by means of the CALPHAD (CALculation of PHAse Diagram) approach. All of the experimental phase diagram and thermodynamic data available from the literature were critically reviewed. The liquid was modeled as substitutional solution phase, while the solid solution phases including (γCo), (Ni), (Mo), MoC and Mo2C were described by sublattice model. The M6C and M12C ternary carbides were considered as linear and stoichiometric compounds, respectively. The modeling of C-Co-Mo and C-Mo-Ni systems covers the whole composition and temperature ranges. A set of self-consistent thermodynamic parameters for the C-Co-Mo and C-Mo-Ni systems was finally obtained. 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-Co-Mo and C-Mo-Ni systems were also generated by using the present thermodynamic parameters.

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Acknowledgments

The financial support from the National Natural Science Foundation of China (Grant No. 51371199), Ministry of Industry and Information Technology of China (Grant No. 2015ZX04005008), Project of Innovation-driven Plan in Central South University (Grant No. 2015CX004) and Fundamental Research Funds for the Central Universities of Central South University (Grant No. 2014zzts022) is greatly acknowledged. The authors thank Prof. Bo. Sundman at INSTN of France for valuable discussions.

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Authors and Affiliations

  1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, Hunan, People’s Republic of China

    Cong Zhang & Yong Du

  2. Sino-German Microstructure Cooperation Group, Central South University, Changsha, 410083, Hunan, People’s Republic of China

    Cong Zhang & Yong Du

  3. School of Metallurgical Engineering, Hunan University of Technology, Zhuzhou, 412008, Hunan, People’s Republic of China

    Yingbiao Peng

  4. School of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, People’s Republic of China

    Peng Zhou

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Correspondence to Yong Du.

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Zhang, C., Peng, Y., Zhou, P. et al. Thermodynamic Modeling of the C-Co-Mo and C-Mo-Ni Ternary Systems. J. Phase Equilib. Diffus. 37, 423–437 (2016). https://doi.org/10.1007/s11669-016-0471-1

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  • DOI: https://doi.org/10.1007/s11669-016-0471-1

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