| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Ceramic Materials and Processing
|
| Presentation Title |
Reaction Pathways in the Formation and Decomposition of Rocksalt Entropy- Stabilized Oxides |
| Author(s) |
John Heron |
| On-Site Speaker (Planned) |
John Heron |
| Abstract Scope |
Entropy-stabilized oxides represent a unique class of single-phase, multicomponent oxides that are characterized through the effects of configurational disorder. The wide combinatorial space offered by complex materials, however, challenges our ability to predict reaction dynamics leading to entropy stabilization as well as to pathways to the decomposition of the material. Here, an investigation of the formation and decomposition of (MgCoNiCuZn)O spanning the temperature range of 600 °C – 1700 °C. We will emphasize the importance of kinetics and selective melting to both single phase formation and decomposition. Contrary to recent challenges of the entropy hypothesis, we find that the nature of the partial phase separation provides further evidence for entropic stabilization. Our results reveal that selective melting may be utilized to realize and design other ESO and oxide phases and their decomposition. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, High-Entropy Alloys, |