Simulating Neutron Radiation Damage of Graphite by In-situ Electron Irradiation

Electron Microscopy and Analysis Group Conference 2013

Mironov, Brindusa E.^1 ; Freeman, H.M.^1 ; Brydson, R.M.D.^1 ; Westwood, A.V.K.^1 ; Scott, A.J.^1

Institute for Materials Research, University of Leeds, LS2 9JT Leeds, United Kingdom^1

关键词: Carbon K-edge;    Chemical bondings;    Electron-beam exposure;    Fringe analysis;    Image analysis software;    Neutron radiations;    Research groups;    Structural disorders;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/522/1/012051/pdf
DOI  :  10.1088/1742-6596/522/1/012051

来源: IOP

【 摘 要 】

Radiation damage in nuclear grade graphite has been investigated using transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS). Changes in the structure on the atomic scale and chemical bonding, and the relationship between each were of particular interest. TEM was used to study damage in nuclear grade graphite on the atomic scale following 1.92×108electrons nm-2of electron beam exposure. During these experiments EELS spectra were also collected periodically to record changes in chemical bonding and structural disorder, by analysing the changes of the carbon K-edge. Image analysis software from the 'PyroMaN' research group provides further information, based on (002) fringe analysis. The software was applied to the micrographs of electron irradiated virgin 'Pile Grade A' (PGA) graphite to quantify the extent of damage from electron beam exposure.