| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Spectroscopic Methods and Analysis for Nuclear Energy Related Materials
|
| Presentation Title |
Observing radiation enhanced diffusion in model Fe-Cr alloys and their oxides using atom probe tomography |
| Author(s) |
Kayla Yano, Aaron A Kohnert, Tiffany C Kaspar, Jijo Christudasjustus, Hyosim Kim, Yongqiang Wang, Sandra D Taylor, Daniel K Schreiber |
| On-Site Speaker (Planned) |
Kayla Yano |
| Abstract Scope |
Nuclear reactors encompass a complex intersection of environmental stressors for structural materials, specifically irradiation and oxidation at temperature. These environmental influencers often drive material performance and degradation through atomic transport mechanisms. Understanding mass transport in these conditions is essential for safe and efficient design and operation of reactors. By utilizing embedded isotopic tracers and atom probe tomography (a mass spectroscopy technique that also contains three dimensional spatial information), radiation enhanced diffusion in model Fe-Cr alloys and their oxides can be measured. Molecular beam epitaxy is used to grow the model Fe-Cr and Fe2O3 films with 57Fe and 18O isotopic tracer layers, while ion irradiation is used to generate non-equilibrium defect populations that drive the enhanced diffusion. Prior studies examined radiation enhanced diffusion through model, single-crystalline iron oxides. This study advances the approach by taking particular interest in diffusion along and towards higher-dimensional defect sinks including grain boundaries and dispersed oxides. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Environmental Effects, Characterization |