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Ojovan, Michael
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Publications (3/3 displayed)
- 2022On Structural Rearrangements during the Vitrification of Molten Coppercitations
- 2021Prediction of second melting temperatures already observed in pure elements by molecular dynamics simulationscitations
- 2021Comments about a recent publication entitled “Improving glass forming ability of off-eutectic metallic glass formers by manipulating primary crystallization reactions”citations
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article
On Structural Rearrangements during the Vitrification of Molten Copper
Abstract
<jats:p>We utilise displacement analysis of Cu-atoms between the chemical bond-centred Voronoi polyhedrons to reveal structural changes at the glass transition. We confirm that the disordered congruent bond lattice of Cu loses its rigidity above the glass transition temperature (Tg) in line with Kantor–Webman theorem due to percolation via configurons (broken Cu-Cu chemical bonds). We reveal that the amorphous Cu has the Tg = 794 ± 10 K at the cooling rate q = 1 × 1013 K/s and that the determination of Tg based on analysis of first sharp diffraction minimum (FDSM) is sharper compared with classical Wendt–Abraham empirical criterion.</jats:p>