| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bulk Metallic Glasses XX
|
| Presentation Title |
Enhanced Stability of Metallic Glass Thin Films using an Ion Beam at Room Temperature |
| Author(s) |
Vrishank Jambur, Chengrong Cao, Carter Francis, John Perepezko, Izabela Szlufarska, Paul Voyles |
| On-Site Speaker (Planned) |
Paul Voyles |
| Abstract Scope |
Metallic glass thin films offer better thermal stability in the form of a higher glass transition temperature, Tg, and higher hardness than the same alloy quenched from the liquid. The enhanced stability of films is likely to arise from high surface diffusivity during deposition, since the surface diffusivity of metallic glasses can be orders of magnitude higher than the bulk diffusivity. High surface diffusivity allows surface atoms to explore many configurations before being covered by additional atoms arriving from the vapor. We have demonstrated that a low energy (120-170 eV) Ar ion beam applied to the surface of metallic glass films growing at room temperature also increases stability. Films with the ion beam showed higher Tg and modestly enhanced hardness compared to films deposited at the same temperature without the ion beam. Preliminary results suggest that the same ion beam treatment dramatically increases surface diffusion at room temperature. |
| Proceedings Inclusion? |
Planned: |