Abstract
Based on our earlier hypothesis of weak nonlocality, we developed a method for calculating the temperature dependences of the width and specific energy of the interphase boundary for binary substitutional alloys, using the concentration dependence of the internal energy or the equilibrium phase diagram of the alloy. Numerically calculated temperature dependences of the solubility limits, specific energy, and thickness of the interphase boundary are presented for three thermodynamic models: the regular solution model (Nb–Cu alloy), the quasi-regular solution model, and the general case (Fe–Cu alloy and A–B alloy that differs from Fe–Cu in the sign of excess entropy).
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ACKNOWLEDGMENTS
We are grateful to the participants of the seminar of the Laboratory of Diffusion of the Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, and especially to the head of the laboratory, Doctor of Technical Sciences Prof. V.V. Popov, Doctor of Physics and Mathematics M.I. Kurkin, and Doctor of Physics and Mathematics Prof. A.E. Ermakov for discussion of the work and useful comments. The authors are especially grateful to Candidate of Physics and Mathematics V.Ya. Raevskii for help in numerical calculations.
Funding
This work was carried out in part within a state task from the Ministry of Education and Science of the Russian Federation (topic “Pressure” no. AAAA-A18-118020190104-3 and topic “Quantum” no. AAAA-A18-118020190095-4).
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Translated by E. Chernokozhin
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Gapontsev, V.L., Gapontsev, A.V., Gapontsev, V.V. et al. Determining the Interphase Boundary Parameters in Heterogeneous Binary Alloys on the Basis of the Hypothesis of Weak Nonlocality. Phys. Metals Metallogr. 122, 26–32 (2021). https://doi.org/10.1134/S0031918X2101004X
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DOI: https://doi.org/10.1134/S0031918X2101004X