Abstract
A simple theory is proposed for thermodynamic properties of nitrogen liquid solutions in Ni–Co alloys. This theory is completely similar to the theory for nitrogen liquid solutions in Fe–Cr, proposed by the authors in 2019. The theory is based on the lattice model of Ni–Co solutions. An FCC model lattice is assumed. In the sites of this lattice, nickel and cobalt atoms are located. Nitrogen atoms are located in octahedral interstices. Nitrogen atoms interact only with metal atoms located in the lattice sites neighboring to it. This is a pairwise interaction. The initial variables of the calculations are the Sieverts law constants for nitrogen solubility in liquid nickel and liquid cobalt. The calculation result is the Wagner interaction coefficient in nickel-based alloys at the temperature of 1873 K: \(\varepsilon _{{\text{N}}}^{{{\text{Co}}}}\) = –1.35. This value agrees well with the experimental data (Kowanda and Speidel, 2003).
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Translated by I. Moshkin
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Bol’shov, L.A., Korneichuk, S.K. & Bol’shova, E.L. Wagner Interaction Coefficient between Nitrogen and Cobalt in Liquid Nickel-Based Alloys. Steel Transl. 52, 201–202 (2022). https://doi.org/10.3103/S0967091222020036
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DOI: https://doi.org/10.3103/S0967091222020036