Relaxation dynamics of glasses along a wide stability and temperature range
| Autor: | Joan Ràfols-Ribé, M. Gonzalez-Silveira, Javier Rodríguez-Viejo, Cristian Rodríguez-Tinoco |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Work (thermodynamics)
Materials science FOS: Physical sciences Thermodynamics 02 engineering and technology Calorimetry Condensed Matter - Soft Condensed Matter 010402 general chemistry 01 natural sciences Condensed Matter::Disordered Systems and Neural Networks Article Supercooling Condensed Matter - Materials Science Multidisciplinary Amorphous metal Scaling laws Glasses Relaxation (NMR) Materials Science (cond-mat.mtrl-sci) Atmospheric temperature range 021001 nanoscience & nanotechnology 0104 chemical sciences Condensed Matter::Soft Condensed Matter Devitrification Soft Condensed Matter (cond-mat.soft) 0210 nano-technology Ultrashort pulse |
| Zdroj: | Scientific Reports Recercat. Dipósit de la Recerca de Catalunya instname Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona Recercat: Dipósit de la Recerca de Catalunya Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/srep35607 |
| Popis: | While lot of measurements describe the relaxation dynamics of the liquid state, experimental data of the glass dynamics at high temperatures are much scarcer. We use ultrafast scanning calorimetry to expand the timescales of the glass to much shorter values than previously achieved. Our data show that the relaxation time of glasses follows a super-Arrhenius behaviour in the high-temperature regime above the conventional devitrification temperature heating at 10 K/min. The liquid and glass states can be described by a common VFT-like expression that solely depends on temperature and limiting fictive temperature. We apply this common description to nearly-isotropic glasses of indomethacin, toluene and to recent data on metallic glasses. We also show that the dynamics of indomethacin glasses obey density scaling laws originally derived for the liquid. This work provides a strong connection between the dynamics of the equilibrium supercooled liquid and non-equilibrium glassy states. Comment: Main manuscript (25 pages, 2 figures) plus supplementary information (12 pages, 7 figures) |
| Databáze: | OpenAIRE |
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