About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XVII
|
Presentation Title |
Comparison of Excess Entropy in Strong and Fragile Glasses |
Author(s) |
Hillary Smith, Marios Demetriou, Brent Fultz |
On-Site Speaker (Planned) |
Hillary Smith |
Abstract Scope |
The excess entropy of metallic glasses was recently found to be almost entirely configurational in origin. Experimental measurements of the vibrational entropy through the glass transition in Cu50Zr50 and Cu46Zr46Al8, in combination with calorimetry measurements of the total entropy, showed a similar result for both metallic glasses. A purely configurational transition was postulated by Gibbs and co-workers in early theories of the large heat of the glass transition. However, it remains unclear whether the result demonstrated for metallic glasses will hold true for all glasses. New measurements of the vibrational entropy of an extremely fragile Pt-based metal/metalloid glass and the canonical fragile glass, ortho-terphenyl, will be compared to previous results. Progress towards a ‘universal’ understanding of the entropy through the glass transition will be discussed. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |