Abstract
A thermodynamic approach to the description of single- and multistage crystallization of iron- and aluminum-based amorphous alloys is suggested in this work. The adequacy of theoretical calculation of the volume fraction of the crystalline phase to experimental data is demonstrated for the case of precipitation of one or several phases in disordered systems. The parameters of the model depend on the rate of heating of amorphous alloy. In the case of multistage crystallization, the theoretical calculations indicate the occurrence of thermal processes in the system, which affect the crystallite growth. These processes are the decelerated growth of crystallites of the same phase; enrichment of the amorphous matrix in alloy components, which do not crystallize, as a result of thermal diffusion; overlapping thermal effects of different processes; etc.
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ACKNOWLEDGMENTS
We cordially thank Dr. V.I. Tkach for the body of given experimental data, the fruitful discussion of the manuscript, and critical remarks which led to significant improvement of the manuscript.
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Terekhov, S.V. Single- and Multistage Crystallization of Amorphous Alloys. Phys. Metals Metallogr. 121, 664–669 (2020). https://doi.org/10.1134/S0031918X20070108
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DOI: https://doi.org/10.1134/S0031918X20070108