About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Processing of Materials
|
| Presentation Title |
Multi-scale investigation on the phase transformation and microstructural evolution of hydrogen-based direct reduction of hematite. |
| Author(s) |
Francelia Sanchez, Semanti Mukhopadhyay, Arun Devaraj, Vaithiyalingam Shutthanandan, Tiffany Kaspar, Ajay Karakoti |
| On-Site Speaker (Planned) |
Francelia Sanchez |
| Abstract Scope |
Hydrogen-based direct reduction of iron oxide is a feasible solution to lower carbon dioxide emissions in steel production. Single crystals provide a model system free of inherited defects to understand the reduction mechanisms at the microscopic level. Nonetheless, hematite pellets used in steelmaking contain significant content of impurities such as SiO2. In this work, we present the hydrogen-based reduction of a single crystal hematite at 900 °C. In addition, the effect of varying SiO2 content in the reduction of hematite pellets is investigated. The surface morphology, microstructural evolution, elemental, and chemical distribution of the samples were studied using advanced electron microscopy techniques in addition to X-ray diffraction and X-ray photoelectron spectroscopy. Results demonstrate the evolution of microstructure and surface defects as a function of reduction time. Elucidation of the underlying mechanisms in the redox reaction could improve the efficiency of hydrogen-based reduction of iron oxides for decarbonization of ironmaking. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Iron and Steel, Sustainability |