| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Thermodynamics and Kinetics
|
| Presentation Title |
O-5: Computational and Experimental Thermodynamics of Fe-Cr-Al-O Quaternary System |
| Author(s) |
Can Agca, Jake W. McMurray, Joerg C. Neuefeind, Alexandra Navrotsky |
| On-Site Speaker (Planned) |
Can Agca |
| Abstract Scope |
FeCrAl alloys are of importance in as accident tolerant nuclear fuel cladding materials. During a loss of coolant accident, these materials form (Fe,Cr,Al)3O4 spinel solid solutions. It is necessary to understand the thermodynamics of these spinels for modeling accident scenarios. We investigated the melting behavior of these materials using ultra-high temperature (>1500°C) differential thermal analysis and cooling traces with aerodynamic levitation under controlled atmosphere. Atmosphere control is crucial for fixing the Fe2+/Fe3+ ratio affecting the prevalent phase and melting temperature of the material. Solution calorimetry measurements provided enthalpies of formation. The structure of these spinel solid solutions at different temperatures using in-situ synchrotron and neutron diffraction experiments were also probed. Using the CALPHAD method, the Fe-Cr-Al-O quaternary solution phases were represented with Compound Energy Formalism and Ionic Liquid Models. The findings from experimental calorimetry, diffraction and melting experiments were used to optimize the adjustable parameters of these high temperature phases. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |