About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Materials Science
|
| Presentation Title |
Microstructural evolution during low-temperature atmospheric microwave plasma reduction of hematite |
| Author(s) |
Tanishka Kucheria, Prashant Barnwal, Henry Afful, Vivek Pachchigar, Brian Jurczyk, Jessica A. Krogstad, R. Mohan Sankaran |
| On-Site Speaker (Planned) |
Tanishka Kucheria |
| Abstract Scope |
Non-thermal plasma reduction of iron oxide is a promising route for next generation ironmaking. Much of the work to date has emphasized plasma operational parameters and underlying thermodynamics of phase transformations. However, understanding the contribution of the starting ore microstructure and the evolution thereof, in particularly how it differs from thermal reduction methods, is key to effectively implementing this emerging technology. In this study, we show the evolution of hematite (Fe<sub>2</sub>O<sub>3</sub>) disks that are treated with a non-thermal, microwave-powered hydrogen plasma contacting one face of the disk. Through cross-sectional microscopy, we study the progression of the reduction front, the nature of the interfaces between phases and the role of initial and evolving porosity as a function of plasma conditions. The natural decrease in density as a function of reduction progression gives rise to an intercalated pore network that plays an important role in exchanging reactant and product gas phases. |
| Proceedings Inclusion? |
Planned: |