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Thermodynamics and phase relationships of transition metal-sulfur systems: IV. thermodynamic properties of the Ni-S liquid phase and the calculation of the Ni-S phase diagram

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Abstract

An associated solution model is applied to describe the thermodyanmic properties of the liquid Ni-S phase. This model assumes the existence of ‘NiS’ (l) species in the liquid in addition to Ni(l) and S(l). With two solution parameters for the binaries Ni-‘NiS’ and ‘NiS’-S, this model is able to describe the thermodynamic behavior of the liquid phase over a wide range of temperature and composition. Using this model for the liquid phase, a statistical thermodynamic model for the monosulfide phase and empirical thermodynamic equations for β1-Ni3S2 and β2-Ni4S3, the Ni-S phase diagram is calculated. The calculated diagram is in excellent agreement with the available experimental data with the exception that the eutectic composition for the equilibrium L1 + δ + η and those of the two liquids for the equilibriumL 1 + L 2 + η differ from the experimental data by more than 2 at. pct S.

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Authors and Affiliations

  1. Materials Department, College of Engineering and applied Science and Associate Dean for Research of the Graduate School, University of Wisconsin-Milwaukee, 53201, Milwaukee, WI

    R. C. Sharma & Y. A. Chang (Professor of Materials Engineering)

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  1. R. C. Sharma
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  2. Y. A. Chang
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Formerly Post-Doctorl Research Associate, University of Wisconsin-Milwaukee is now Lecturer, Department of Metallurgical Engineering, Indian Institute of Technology, Kanpur, India

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Sharma, R.C., Chang, Y.A. Thermodynamics and phase relationships of transition metal-sulfur systems: IV. thermodynamic properties of the Ni-S liquid phase and the calculation of the Ni-S phase diagram. Metall Trans B 11, 139–146 (1980). https://doi.org/10.1007/BF02657183

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  • DOI: https://doi.org/10.1007/BF02657183

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