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The role of crystal orientation in the dissolution of uo2 thin films

DOI: 10.1016/j.corsci.2018.09.012 DOI Help

Authors: S. Rennie (University of Bristol) , E. Lawrence Bright (University of Bristol) , J. E. Sutcliffe (University of Bristol) , J. E. Darnbrough (University of Bristol; Lawrence) , R. Burrows (National Nuclear Laboratory) , J. Rawle (Diamond Light Source) , C. Nicklin (Diamond Light Source) , G. H. Lander (European Commission, Joint Research Centre (JRC)) , R. Springell (University of Bristol)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Corrosion Science

State: Published (Approved)
Published: September 2018
Diamond Proposal Number(s): 13089

Abstract: Single crystal [0 0 1], [1 1 0], and [1 1 1]-oriented UO2 thin films were utilised to investigate the orientational dependence of radiolytic dissolution. The films were exposed to water in the presence of a synchrotron x-ray source to induce dissolution, with X-ray Reflectivity (XRR) used to observe changes in morphology as a function of exposure time. The [0 0 1] and [1 1 0]-oriented films were found to corrode at comparable rates, however, the [1 1 1] film was significantly more corrosion resistant, passivating after the initial 90 s dissolution period. This result shows the orientational dependence of UO2 dissolution, which may have important consequences for theoretical dissolution models.

Journal Keywords: Uranium dioxide; X-ray reflectivity; radiolytic dissolution; sputtered films; x-ray diffraction

Subject Areas: Chemistry, Materials

Instruments: I07-Surface & interface diffraction

Added On: 03/10/2018 08:57

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