About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XVII
|
Presentation Title |
Glass-forming Liquids Processed Under Ultrahigh Gravitational Accelerations |
Author(s) |
Mihai Stoica, Jörg F. Löffler |
On-Site Speaker (Planned) |
Mihai Stoica |
Abstract Scope |
Bulk metallic glasses generally have compositions close to deep eutectics. Therefore, ultrahigh acceleration processing may be employed for direct and efficient identification of eutectic compositions in multicomponent alloys. The parent glass-forming alloys also tend to feature dispersed phases which are close to or beyond their thermodynamic and mechanical stability. This study describes a high-temperature ultrahigh acceleration processing technique which was designed and constructed in-house and applied on various alloys produced. Pure metals, used as standards, and binary and ternary alloy samples were melted in a special Al2O3-coated TZM (Ti–Zr–Mo) crucible and then slowly cooled during continuous acceleration of maximum 50,000g. Atomic-level stratification is shown to generate more phases than predicted by the Gibbs phase rule under normal gravity. Modified phase diagrams in which new compositional fields and their corresponding structures are inserted will also be presented and discussed. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |