Electron irradiation of nuclear graphite studied by transmission electron microscopy and electron energy loss spectroscopy

Abstract

Structural and chemical bonding changes in nuclear graphite have been investigated during in-situ electron irradiation in a transmission electron microscope (TEM); electron beam irradiation has been employed as a surrogate for neutron irradiation of nuclear grade graphite in nuclear reactors. This paper aims to set out a methodology for analysing the microstructure of electron-irradiated graphite which can then be extended to the analysis of neutron-irradiated graphites. The damage produced by exposure to 200 keV electrons was examined up to a total dose of approximately 0.5 dpa (equivalent to an electron fluence of 5.6 × 1021 electrons cm−2). During electron exposure, high resolution TEM images and electron energy loss spectra (EELS) were acquired periodically in order to record changes in structural (dis)order and chemical bonding, by quantitatively analysing the variation in phase contrast images and EEL spectra.

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Item Type:	Article
Authors/Creators:	Mironov, BE Freeman, HM https://orcid.org/0000-0001-8242-9561 Brown, AP https://orcid.org/0000-0001-9692-2154 Hage, FS Scott, AJ https://orcid.org/0000-0003-4235-6462 Westwood, AVK https://orcid.org/0000-0002-5815-0429 Da Costa, J-P Weisbecker, P Drummond-Brydson, RM https://orcid.org/0000-0003-2003-7612
Editors:	Monthioux, M
Copyright, Publisher and Additional Information:	© 2014. Elsevier. Uploaded in accordance with the publisher's self-archiving policy. NOTICE: this is the author’s version of a work that was accepted for publication in Carbon. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Carbon, 83,(2015) DOI10.1016/j.carbon.2014.11.019
Dates:	Accepted: 10 November 2014 Published (online): 18 November 2014 Published: March 2015
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds)
Date Deposited:	11 Dec 2014 10:10
Last Modified:	20 Jun 2021 08:37
Published Version:	http://dx.doi.org/doi:10.1016/j.carbon.2014.11.019
Status:	Published
Publisher:	Elsevier
Identification Number:	10.1016/j.carbon.2014.11.019
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:81644

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Electron irradiation of nuclear graphite studied by transmission electron microscopy and electron energy loss spectroscopy

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