About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics for Sustainability: An EPD Symposium in Honor of Kazuki Morita
|
| Presentation Title |
Yttrium Modification of Alumina in Molten Iron: Thermodynamics and Kinetics |
| Author(s) |
Jian Kang, Zheyang Lin, Hongpo Wang, Juntong Shen, Yu Wang |
| On-Site Speaker (Planned) |
Jian Kang |
| Abstract Scope |
The modification of alumina (Al2O3) inclusions by yttrium (Y) has attracted considerable attention owing to its pronounced influence on inclusion morphology, steel cleanliness, and mechanical performance. This study systematically investigates the thermodynamic stability and kinetic characteristics of Y-modified Al2O3 to elucidate the transformation mechanisms of oxide inclusions during steelmaking. Thermodynamic calculations of the Y-Al-O system were conducted to delineate the stability diagrams of Al2O3, Y2O3, and Y-Al-O complex oxides. The results show that Y exhibits a strong affinity to oxygen and can efficiently convert Al2O3 into Y-rich phases, such as YAlO3, under appropriate conditions. Moreover, key kinetic parameters, including the reaction rate constant and diffusion coefficients of Y in Al2O3, were quantified to model the modification process. These findings offer valuable fundamental insights for designing Y addition strategies to achieve precise inclusion control in high-quality steel production. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Pyrometallurgy, Iron and Steel, Other |