About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Bulk Metallic Glasses XX
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Presentation Title |
Ultrastable States in Bulk Metallic Glasses |
Author(s) |
Weihua Zhou, Yi Li, A. Lindsay Greer |
On-Site Speaker (Planned) |
A. Lindsay Greer |
Abstract Scope |
There is much interest in ultrastable organic glasses obtained by thin-film deposition onto substrates of optimized temperature [1]. In this work, we explore two questions: can ultrastable states be obtained in metallic glasses? and can these states be obtained in bulk glasses (i.e. not just in deposited thin films)? We explore how the low-energy states in bulk metallic glasses can be compared with other low-energy glassy states, for example in vapour-deposited organics and in amber aged for tens of millions of years under ambient conditions. Comparing the glass-transition temperature on heating the glass (Tg) to its fictive temperature (Tf), through the parameter (Tg ‒Tf)/Tg, allows quantification of this comparison. We show that bulk-metallic-glass samples subjected to optimized mechanical treatments can achieve outstandingly stable (i.e. low-energy) states.
[1] M. D. Ediger, J. Chem. Phys. 147 (2017) 210901. |
Proceedings Inclusion? |
Planned: |
Keywords |
Solidification, Phase Transformations, Other |