Correlation between crystallographic orientation and surface faceting in UO2

JOURNAL OF NUCLEAR MATERIALS

卷:478

Article

Miao, Yinbin¹  Mo, Kun¹  Yao, Tiankai²  Lian, Jie²  Fortner, Jeffrey¹  Jamison, Laura¹  Xu, Ruqing¹  Yacout, Abdellatif M.¹ 

[1] Argonne Natl Lab, Lemont, IL 60439 USA

[2] Rensselaer Polytech Inst, Troy, NY 12180 USA

关键词: Uranium dioxide;    Surface faceting;    Morphology;    Synchrotron diffraction;    Scanning electron microscopy;   

DOI  :  10.1016/j.jnucmat.2016.05.044

来源: Elsevier

【 摘 要 】

Here coordinated experimental efforts to quantitatively correlate crystallographic orientation and surface faceting features in UO2 are reported upon. A sintered polycrystalline UO2 sample was thermally etched to induce the formation of surface faceting features. Synchrotron Laue microdiffraction was used to obtain a precise crystallographic orientation map for the UO2 surface grains. Scanning electron microscopy (SEM) was utilized to collect the detailed information on the surface morphology of the sample. The surface faceting features were found to be highly dependent on the crystallographic orientation. In most cases, Triple-plane structures containing one {100} plane and two {111} planes were found to dominate the surface of UO2. The orientation-faceting relationship established in this study revealed a practical and efficient method of determining crystallographic orientation based on the surface features captured by SEM images. (C) 2016 Published by Elsevier B.V.

【 授权许可】

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