About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XX
|
Presentation Title |
Compositional Dependence of the Fragility in Metallic Glass Forming Liquids |
Author(s) |
Sebastian A. Kube, Sungwoo Sohn, Rodrigo Ojeda Mota, Theo Evers, William Polsky, Naijia Liu, Kevin Ryan, Sean Rinehart, Yong Sun, Jan Schroers |
On-Site Speaker (Planned) |
Sebastian A. Kube |
Abstract Scope |
The viscosity and its temperature dependence, the fragility, are key properties of a liquid. A low fragility is believed to promote the formation of metallic glasses. Yet, the fragility remains poorly understood, since experimental data of its compositional dependence are scarce. Here, we introduce the Film Inflation Method (FIM), which measures the fragility of metallic glass forming liquids across wide ranges of composition and glass-forming ability. We determine the fragility for 170 alloys ranging over 25 at.% in Mg-Cu-Y. Within this alloy system, large fragility variations are observed. Contrary to the general understanding, a low fragility does not correlate with high glass-forming ability here. We introduce crystallization complexity as an additional contribution, which can potentially become significant when modeling glass forming ability over many orders of magnitude. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Thin Films and Interfaces, Other |