About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Hume-Rothery Symposium: Interface Structure and Properties: Impact on Microstructure Evolution
|
| Presentation Title |
The Role of Interfaces in Hydrogen-Based Reduction of Metal Oxides |
| Author(s) |
Dierk R. Raabe |
| On-Site Speaker (Planned) |
Dierk R. Raabe |
| Abstract Scope |
Interfaces play a decisive role in the hydrogen-based reduction of iron oxides by controlling thermodynamics, kinetics, and microstructure evolution. At the Fe/Fe₃O₄ interface, atomically ordered interfacial complexions enhance adhesion and charge transfer, facilitating redox transformations. Reduction of single-crystal hematite shows interface-driven pore formation and orientation-dependent phase boundaries, with porous magnetite layers advancing the reaction front. In nonstoichiometric wüstite, defect clustering and pseudo-phases at the wüstite/iron interface near 1185 K enable percolative mass and charge transport. These interfacial phenomena govern the sequence and morphology of reduction, providing a pathway to optimize reduction rates and product structure. Understanding and tailoring such interfaces is critical for advancing low-carbon steelmaking through hydrogen metallurgy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Sustainability, Phase Transformations, Characterization |