| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Atom Probe Tomography for Advanced Characterization of Metals, Minerals and Materials III
|
| Presentation Title |
Atom Probe Tomography Study of Fission Products in Neutron Irradiated U-Mo Fuel |
| Author(s) |
Maalavan Arivu, Andrew Hoffman, Haiming Wen |
| On-Site Speaker (Planned) |
Maalavan Arivu |
| Abstract Scope |
U-Mo fuel has gained interest in replacing high enriched fuels for high performance research reactors. Previous studies using transmission electron microscopy (TEM) have shown interesting features in irradiated U-Mo fuels including the formation of fission gas bubble superlattices. TEM is, however, limited in its ability to accurately measure chemical data for nanoscale features. In this study, we have used atom probe tomography (APT) in order to gain a clearer picture of the 3-D chemical makeup of the features in irradiated U-Mo fuel. Through this APT investigation, Xe gas bubbles were found though not always forming a superlattice structure. Nd clusters were also observed and often formed their own superlattice structure. Grain boundaries were found to be enriched in fission products, and near large gas bubbles and grain boundaries, the enrichment of Xe caused surrounding regions to become depleted in Xe, forming denuded zones free of any gas bubbles. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |