NSUF 13-429: Electron Backscatter Diffraction and Atom Probe Tomography to Study Grain Boundary Chemistry Variation in Off Stoichiometric Uranium Dioxide Thin Films
It is widely known that microstructural changes influence the thermal performance of nuclear fuels. One mechanism that plays a pivotal role in the microstructural evolution is fuel chemistry variation at boundaries, specifically grain boundaries. Changes in the microstructure, specifically discontinuities at grain boundaries, lead to a change in the efficiency of the transport of phonons or lattice vibrations. Focused research is needed to help explain the role grain boundary character plays fuel chemistry and thus the thermal transport properties in UO2. The objective of this proposed research is to study the effect of grain boundary character on the microstructure of nuclear fuel. The goal is to elucidate the fundamental material-physics underlying the connection between fuel chemistry variation at specific grain boundaries and their role in thermal transport properties. The proposed research utilizes electron backscatter diffraction (EBSD) and energy dispersive spectroscopy (EDS) to study grain boundary dependent chemistry change in off stoichiometric polycrystalline UO2 thin films. In order to characterize grain boundary character and changes in fuel chemistry across the grain boundary of interest in UO2, electron backscatter diffraction (EBSD) in conjunction with energy dispersive spectroscopy (EDS) available at CAES will be used. Samples will be prepared by conventional techniques for EBSD [1]. Samples will be studied in the late Summer or early Fall 2013. Final results will then be published in peer- reviewed journal articles. It is expected that these results will provide new insight into the grain boundary character dependence on chemistry variation in UO2, allowing for the correlation with atomic-level simulations and/or the ability to link with mesoscale structure-property relationships, specifically in thermal transport. References [1] P. V. Nerikar, et. al. J. Am. Ceram. Soc. 94 [6] 1893-1900 (2011)
Informație Adițională
| Cîmp | Valoare |
|---|---|
| Awarded Institution | University of Florida |
| Embargo End Date | 2026-02-27 |
| Facility Tech Lead | Mukesh Bachhav |
| NSUF Call | FY 2013 RTE Solicitation |
| PI | Michele Manuel |
| Project Member | Dr. Jian Gan, Research Scientist - Idaho National Laboratory (https://orcid.org/0000-0002-9121-4164) |
| Project Member | Dr. Michele Manuel, Professor and Chair - University of Florida (https://orcid.org/0000-0002-3495-7826) |
| Project Member | Billy Valderrama - University of Florida |
| Project Member | Hunter Henderson - University of Florida |
| Project Type | RTE |
| Publication | Investigation of material property influenced stoichiometric deviations as evidenced during UV laser-assisted atom probe tomography in fluorite oxides Todd Allen, Jian Gan, Hunter Henderson, Michele Manuel, Billy Valderrama, Clarissa Yablinsky Nuclear Instruments and Methods in Physics Research B: Beam Interactions with Materials and Atoms 359 2015-07-07 https://www.sciencedirect.com/science/article/pii/S0168583X15006266#ak005 |
| Publication | Structure and properties of uranium oxide thin films deposited by pulsed dc magnetron sputtering Michele Manuel, Billy Valderrama Applied Surface Science 301 2014-05-15 http://www.sciencedirect.com/science/article/pii/S0169433214004103 |
| Publication | Bubble formation and Kr distribution in Kr-irradiated UO2 Todd Allen, Anter EL-AZAB, Jian Gan, Mahima Gupta, Andrew Nelson, Janne Pakarinen, Billy Valderrama, Lingfeng He, Hunter Henderson, Michele Manuel Journal of Nuclear Materials 456 2015-01-15 https://www.sciencedirect.com/science/article/pii/S0022311514006163#ak005 |
| Publication | Influence of instrument conditions on the evaporation behavior of uranium dioxide with UV laser-assisted atom probe tomography Jian Gan, Billy Valderrama, Hunter Henderson, Michele Manuel Journal of Nuclear Materials 459 2015-04-01 http://dx.doi.org/10.1016/j.jnucmat.2014.12.119 |
| RTE Number | 429 |