| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Seaborg Institutes: Emerging Topics in Actinide Materials and Science
|
| Presentation Title |
In Situ and In Operando Approaches for Studying Actinide Oxidation Behavior with Near-atomic Scale Resolution |
| Author(s) |
Elizabeth J. Kautz, Sten Lambeets, Daniel Perea, Daniel Schreiber, Arun Devaraj |
| On-Site Speaker (Planned) |
Elizabeth J. Kautz |
| Abstract Scope |
The development of in situ and in operando atom probe tomography techniques have enabled the study of gas/solid interactions of actinide species relevant to fuel processing, waste storage, and forensic investigations. Here, we report complementary in situ and in operando atom probe results focused on mapping elemental distributions during oxidation of a uranium-molybdenum alloy in three dimensions with near atomic-scale resolution. We observe reaction fronts present at oxide/metal, oxide/sub-surface hydride, and outer oxide/gas interfaces. Alloying and impurity elements are found to redistribute across the oxide/metal interface and be enriched in the outer oxide. Our studies demonstrate that the combination of in situ and in operando techniques can build a better mechanistic understanding of resultant composition and surface and subsurface structure changes accompanying gas/surface reactions in actinide material systems. The methods and work presented here will be discussed in the context of enabling predictive capabilities that can inform forensic investigations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, Environmental Effects |