About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Theory and Design of Metallic Glasses
|
| Presentation Title |
Facilitated Dynamics in a Metallic Supercooled Liquid |
| Author(s) |
Shuoyuan Huang, Shiyi Qin, Victor Zavala, Paul Voyles |
| On-Site Speaker (Planned) |
Paul Voyles |
| Abstract Scope |
Dynamics in supercooled metallic liquids are spatially and temporally complex. One form of complexity is dynamic facilitation, in which nanoscale regions with fast dynamics, reflected by a short structural relaxation time, trigger fast dynamics in neighboring regions. Dynamic facilitation is essential to some theories of supercooled liquids. Facilitation has been observed in the trajectories of single particles in molecular dynamics simulations and in colloids, but it has not been directly observed in atomic liquids. We have previously employed electron correlation microscopy (ECM) to observe spatially heterogeneous dynamics in the supercooled liquids of metallic glass forming alloys. Here we show that ECM data provide experimental evidence for dynamic facilitation in the same systems by comparing experiments, synthetic data from a phenomenological model with adjustable facilitation, and data derived from molecular dynamics simulations. Topological data analysis of the 3D ECM data cube reveals the subtle spatiotemporal signatures of dynamic facilitation. |
| Proceedings Inclusion? |
Planned: |