About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Interrelated Extremes in Materials Degradation for Fission and Fusion Environments
|
| Presentation Title |
Disordering and Defect Evolution Processes at Epitaxial Fe3O4 / Cr2O3 and Fe2O3 / Cr2O3 Interfaces under Irradiation |
| Author(s) |
Tiffany Kaspar |
| On-Site Speaker (Planned) |
Tiffany Kaspar |
| Abstract Scope |
The response of oxide materials to irradiation is complicated by the presence of interfaces, which can serve as either point defect sinks or accumulation sites; the response depends on factors such as interfacial structure, chemistry, and termination. We have characterized the point defect evolution and disordering of epitaxial Fe3O4(111) / Cr2O3(0001) and Fe2O3(0001) / Cr2O3(0001) thin film heterostructures after ion irradiation at room temperature. Irradiation of Fe3O4 / Cr2O3 leads to damage accumulation on the Fe3O4 side of the heterointerface. Positron annihilation spectroscopy (PAS) of heterostructures after irradiation reveals different defect evolution pathways in Fe3O4 compared to Cr2O3, impacting lattice strain. PAS of Fe2O3 / Cr2O3 and Cr2O3 / Fe2O3 heterostructures after irradiation of the top film reveals a preference for point defects to cross the interface from Fe2O3 to Cr2O3, but not the reverse. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Thin Films and Interfaces, Nuclear Materials |