About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Local Chemical Ordering and Its Impact on Mechanical Behaviors, Radiation Damage, and Corrosion
|
| Presentation Title |
Kinetics of One-Step Solid-State Alloy Making: On the Local Chemistry at the Metal-Oxide Interface |
| Author(s) |
Shaolou Wei, Xinren Chen, Xuyang Zhou, Dierk Raabe |
| On-Site Speaker (Planned) |
Shaolou Wei |
| Abstract Scope |
Hydrogen-based solid-state redox reactions are attractive pathways to synthesize metallic alloys without melting while maintaining zero carbon footprint. Unlike the theoretically predictable thermodynamic driving force that leverages the optimal synergy between oxide reduction and alloying, the critical kinetic micro-mechanisms remain elusive, especially when metal-oxide interfaces form at intermediate stages of the process. Exploiting the mixtures of Fe2O3 and NiO as a model system to synthesize Fe-36Ni invar alloy, we ask: (i) Do the actual oxide reduction-alloying micro-events necessarily comply with the global thermodynamic driving force prediction? (ii) How does the local chemical environment near the metal-oxide interface affect the solid-state alloying process? and (iii) To what extent can metal-oxide interface accelerate/impede complete oxide-to-alloy conversion? These questions will be addressed by coupling in situ synchrotron X-ray diffractometry and 4D-scanning transmission electron microscopy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Sustainability, Extraction and Processing |