| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Neutron and X-ray Scattering in Materials Science
|
| Presentation Title |
High-frequency Transverse Phonons in Metallic Glasses |
| Author(s) |
Xiyang Li, Huaping Zhang, Si Lan, Doug L. Abernathy, Maozhi Li, Xun-Li Wang |
| On-Site Speaker (Planned) |
Xun-Li Wang |
| Abstract Scope |
Transverse phonons are an essential part of the dynamics spectra in glasses and liquids. Using inelastic neutron scattering and molecular dynamics (MD) simulations on a model Zr-Cu-Al metallic glass, we show that transverse phonons persist well into the high-frequency regime [1]. The MD simulations further revealed that the apparent peak width of the transverse phonons follows the static structure factor, indicating a close link between the phonon dynamics and the underlying disordered structure. The one-to-one correspondence was demonstrated numerically with empirical potentials for Zr-Cu-Al metallic glass as well as with a Lennard-Jones potential, suggesting that the correlation is a universal feature of glass. This remarkable correlation, which was found for the transverse but not longitudinal phonon branch, underscores the key role that transverse phonons hold for understanding the dynamics in disordered materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Modeling and Simulation, Other |