Abstract
AbstractReducing the sample size can profoundly impact properties of bulk metallic glasses. Here, we systematically reduce the length scale of Au and Pt-based metallic glasses and study their vitrification behavior and atomic mobility. For this purpose, we exploit fast scanning calorimetry (FSC) allowing to study glassy dynamics in an exceptionally wide range of cooling rates and frequencies. We show that the main α relaxation process remains size independent and bulk-like. In contrast, we observe pronounced size dependent vitrification kinetics in micrometer-sized glasses, which is more evident for the smallest samples and at low cooling rates, resulting in more than 40 K decrease in fictive temperature, Tf, with respect to the bulk. We discuss the deep implications on how this outcome can be used to convey glasses to low energy states.
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary
Reference89 articles.
1. Stillinger, F. H. & Debenedetti, P. G. Glass transition thermodynamics and kinetics. Ann. Rev. Cond. Matter Phys. 4, 263–285 (2013).
2. Schmelzer, J. W. P. & Gutzow, I. S. Glasses and the glass transition. (Wiley-VCH, Weinheim, 2011).
3. Kovacs, A. J. Glass transition in amorphous polymers: a phenomenological study. Adv. Polym. Sci. 3, 394–508 (1963).
4. Struik, L. C. E. Physical aging in amorphous polymers and other materials (Technische Hogeschool Delft, 1977).
5. Cangialosi, D., Boucher, V. M., Alegria, A. & Colmenero, J. Physical aging in polymers and polymer nanocomposites: recent results and open questions. Soft Matter 9, 8619–8630 (2013).
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