|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Atom Probe Tomography for Advanced Characterization of Metals, Minerals and Materials
||Atom Probe Tomography and Correlative Microscopy of Uranium-10 wt% Molybdenum Alloy Nuclear Fuels
||Arun Devaraj, Elizabeth Kautz, Curt Lavender, Vineet Joshi
|On-Site Speaker (Planned)
Monolithic low enriched U10Mo alloys are considered as a candidate fuel form to replace enriched Uranium fuels in research and test reactors across the world. Beginning from casting of the low enriched U10Mo alloys, multiple sequential steps of thermomechanical treatments are utilized to form the final fuel plate. We utilized transmission electron microscopy and atom probe tomography (APT) to measure the concentration of dissolved impurities in grain boundaries, gamma-UMo grain interiors and solute partitioning across interfaces between impurity phase precipitates like UC, U2Si2MoC and gamma-UMo matrix, all as a function of thermomechanical treatments. APT was also instrumental in understanding nanoscale compositional analysis of transformation products of UMo alloys during sub-eutectoid annealing. By conducting APT analysis of both depleted UMo and low enriched UMo alloys and then studying the APT mass-to-charge spectra, efficiency of probing isotopic ratios of U in metallic fuels by APT was also evaluated.
||Planned: Supplemental Proceedings volume