About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Processing of Materials
|
| Presentation Title |
Hydrogen reduction of oxide blends: a sustainable pathway for synthesis of ferroalloys |
| Author(s) |
David C. Dunand, Ya-Chu Hsu |
| On-Site Speaker (Planned) |
David C. Dunand |
| Abstract Scope |
Binary ferroalloys are synthesized by creating a blend of Fe2O3 and a binary transition metal oxide powders, followed by reduction, interdiffusion, and sintering under H2. In-situ X-ray diffraction analysis reveals the sequential phase evolution, including reduction mechanisms, reactions between oxides, and interactions between metallic phases (interdiffusion and allotropic transformations). The transition metal oxides exhibit a range of thermodynamic stabilities and undergo reduction under a controlled heating process. Relatively less stable oxides begin to reduce at lower temperatures, whereas more thermodynamically stable oxides require higher temperatures and longer durations to achieve complete reduction. The metals reduced from the more stable binary oxides subsequently react with reduced iron to form solid solutions or intermetallic compounds, with some unreduced oxide inclusions encapsulated within the metallic matrix. This study demonstrates that, taking advantage of the Le Châtelier principle, oxides with high thermodynamic stability can be fully reduced in the presence of Fe with hydrogen. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Sustainability, Extraction and Processing, Iron and Steel |