Abstract
The characteristics of the fluctuation free volume theory, as applied to amorphous metallic alloys, are calculated from the data on the parameters of the Fulcher-Vogel-Tammann equation for the temperature dependence of viscosity. The fraction of the fluctuation free volumef g frozen at the glass transltion temperatureT g is equal to approximately 0.026 for amorphous alloys. The found value coincides with the data for amorphous polymers and other glasses and indicates that the glass transltion criterionf g ≅ const ≈ 0.025 is applicable to these glass-forming systems. The energy of formation for a fluctuation hole in metallic glasses (εh = 15–25 kJ/mol) is approximately equal to that for alkali silicate glasses. The formation of holes in amorphous alloys is a low-energy small-scale process arising from the limiting displacement of an atom (a group of atoms) from an equilibrium position.
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Sanditov, D.S., Sangadiev, S.S. & Sanditov, B.D. Fluctuation free volume of metallic glasses. Glass Phys Chem 26, 59–63 (2000). https://doi.org/10.1007/BF02731944
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DOI: https://doi.org/10.1007/BF02731944