|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Comparison of Excess Entropy in Metallic and Oxide Glasses
||Hillary Smith, Marios Demetriou, Brent Fultz
|On-Site Speaker (Planned)
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 Cu<SUB>50</SUB>Zr<SUB>50</SUB> and Cu<SUB>46</SUB>Zr<SUB>46</SUB>Al<SUB>8</SUB>, 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. Measurements of the vibrational entropy of the strong oxide glass GeO2 in the glass, liquid, and crystalline phases will be compared to previous results for metallic glasses. Progress towards a ‘universal’ understanding of the entropy through the glass transition will be discussed.
||Planned: Supplemental Proceedings volume