| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Influence of Irradiation on Microstructure and Oxidation Behavior in Fe-8Cr Film |
| 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 |
Irradiation damage in reactor materials induces microstructural changes and alters surface chemistry, affecting performance in extreme environments. The study examines these effects using a 100 nm Fe-8Cr epitaxial film grown on MgO (001) substrate via molecular beam epitaxy, providing a uniform, grain boundary-free structure for precise assessment of radiation-induced modifications. The film was irradiated separately with He and Fe ions at room temperature. Cross-sectional TEM analysis revealed progressive penetration of He-induced damage, consistent with SRIM predictions. Defect morphology evolved from isolated dislocation loops at low fluence to complex dislocation networks at high fluence. Notably, larger bubbles formed at lower fluence due to limited dislocation sites, while higher fluence produced smaller bubbles within extensive dislocation networks. Fe irradiation distinctly altered oxidation kinetics and oxide chemical composition. The results demonstrate how He irradiation influences microstructural development while Fe irradiation affects surface chemistry. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, Surface Modification and Coatings |