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arXiv · 2505.17874

Relationship of structural disorder and stability of supercooled liquid state with glass-forming ability of metallic glasses

J. B. Cui·R. A. Konchakov·G. V. Afonin·A. S. Makarov·G. J. Lyu·J. C. Qiao·N. P. Kobelev·V. A. Khonik
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Abstract

We performed calorimetric studies of 26 metallic glasses and calculated the excess entropy and excess enthalpy with respect to their counterpart crystals. On this basis, we introduced a dimensionless entropy-based parameter {\sigma}scl, which characterizes structural disordering and stability of the supercooled liquid state upon heating. A very good correlation of {\sigma}scl with literature data on the critical cooling rate Rc and critical diameter Dmax of metallic glasses is shown. We also introduced another dimensionless parameter {\eta}scl based on the excess enthalpy of glass and showed that {\eta}scl provides equally good correlation with Rc and Dmax. Possible relationship of structural disordering and glass-forming ability in the supercooled liquid range with the defect structure of glass is discussed. The obtained results provide a new window for the understandingof the glass-forming ability of metallic glasses.

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J. B. Cui, R. A. Konchakov, G. V. Afonin, A. S. Makarov, G. J. Lyu, J. C. Qiao, N. P. Kobelev, V. A. Khonik. 2025-05-23. Relationship of structural disorder and stability of supercooled liquid state with glass-forming ability of metallic glasses. https://arxiv.org/abs/2505.17874

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