| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
Complex Concentrated Grain Boundaries and the Stabilization of Unexpected Interfacial Structures |
| Author(s) |
Timothy J. Rupert |
| On-Site Speaker (Planned) |
Timothy J. Rupert |
| Abstract Scope |
Complex concentrated compositions have been shown to stabilize bulk phases in recent years, most notably in high entropy alloys. In this talk, we explore how this same principle results in unexpected grain boundary phenomenon in both metals and oxides. First, the existence of extended segregation zones is demonstrated in a wide range of materials, with specific trends in composition and local chemical ordering shown to alter important mechanical and functional properties. This behavior also has a profound effect on grain boundary structural transitions, stabilizing metastable states against transformation into the equilibrium ground state. In addition, complex concentrated grain boundary compositions are observed to promote structural disordering of the interface, aiding sintering and improving the radiation tolerance of their host materials. As a whole, this work shows that complex grain boundary chemistries offer new and exciting possibilities. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, High-Entropy Alloys, Phase Transformations |