| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Surface Chemistry of Irradiation and Molten Salt Corrosion Effect on Fe-8Cr |
| Author(s) |
Jijo Christudasjustus, Kayla Yano, Tanvi Ajantiwalay, Minju Choi, Mark Bowden, Hyosim Kim, Ryan Hayes, Daniel Schreiber, Tiffany Kaspar |
| On-Site Speaker (Planned) |
Jijo Christudasjustus |
| Abstract Scope |
The combined effects of irradiation and a corrosive environment on nuclear structural materials can either enhance or retard corrosion events, raising important questions about how irradiation-induced defects influence species transport and subsequent corrosion behavior. To study this event, 100 nm thick epitaxial Fe-8Cr film was grown on a (001) MgO substrate using molecular beam epitaxy to obtain a low-defect, boundary-free structure and then irradiated with Fe2+ ions to achieve doses of 0.5 and 5 dpa at 5 MeV. X-ray photoelectron spectroscopy was used to examine the changes in oxidation kinetics post-irradiation. The film was then exposed to FLiNaK salt in a controlled atmosphere, and the affected region was analyzed using transmission electron microscopy. The results revealed atomic-scale lattice distortions due to salt penetration. Additionally, the Cr layer over the salt indicated a separation from the matrix, potentially explaining the change in the corrosion resistance of the alloy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, Surface Modification and Coatings |