About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Theory and Design of Metallic Glasses
|
| Presentation Title |
Operando Probe of Dynamics in Pt-Based Metallic Glasses |
| Author(s) |
Hillary Smith, Wuqian Zhang, Grady Savage |
| On-Site Speaker (Planned) |
Hillary Smith |
| Abstract Scope |
A major challenge in understanding metallic glass-formers is probing the metastable undercooled liquid phase just above the glass transition. The excess enthalpy and Gibbs free of the undercooled liquid phase compared to the crystalline state creates a driving force that leads to rapid crystallization at temperatures above Tg. We have used operando inelastic neutron scattering (INS) and differential scanning calorimetry to study the dynamical and structural evolution above Tg in ultra-fragile Pt-based metallic glasses. Our INS methods assess the phonon density of states in glasses as they traverse the glass transition, capturing real-time changes to the phonon vibrational modes. Simultaneously, we observe structural information from elastic scattering as the glass transforms from amorphous solid into the supercooled liquid phase and then crystallizes. This talk will discuss structural relaxation, crystallization, and the correlation between configurational and vibrational entropy in the amorphous, crystalline, and undercooled liquid states in Pt-based metallic glasses. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Characterization, |