| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure and Dynamics of Metallic Glasses
|
| Presentation Title |
Structure of metallic glasses and their untypical crystallization below the glass-transition temperature |
| Author(s) |
Dmitri Louzguine |
| On-Site Speaker (Planned) |
Dmitri Louzguine |
| Abstract Scope |
New findings on the atomic structure of metallic glasses will be presented. I will also present scientific results on the nanocrystallization of Al-, Ti-, Mg-, Cu- and other metallic glasses. We conducted ex-situ and in-situ heating up to slightly below the glass-transition temperature experiments, where atomic diffusion is limited and decoupled between elements. Our results indicate unconventional crystallization mechanisms driven by differences in atomic diffusion coefficients among alloying elements. Our investigations revealed that the growth rate of nanocrystals in these metallic glasses exceeded predictions based on viscosity and diffusion data. We suggest that the atomic transfer at the glass/crystal interface may be influenced by the corresponding difference in the thermodynamic and chemical potentials. Additionally, I will present recent findings on solid-state, room-temperature mechanochemically-induced nanocrystallization of a Mg-based metallic glass. These results contribute to our understanding of nanocrystallization mechanisms and hold implications for the development of advanced metallic glass nanocomposites. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Solidification, Composites |