Freeman, HM, Mironov, BE, Windes, W et al. (4 more authors) (2017) Micro to nanostructural observations in neutron irradiated nuclear graphites PCEA and PCIB. Journal of Nuclear Materials, 491. pp. 221-231. ISSN 0022-3115
Abstract
The neutron irradiation-induced structural changes in nuclear grade graphites PCEA and PCIB were investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), selected area electron diffraction (SAED) and electron energy loss spectroscopy (EELS). The graphite samples were irradiated at the Advanced Test Reactor at the Idaho National Laboratory. Received doses ranged from 1.5 to 6.8 displacements per atom and irradiation temperatures varied between 350 °C and 670 °C. XRD and Raman measurements provided evidence for irradiation induced crystallite fragmentation, with crystallite sizes reduced by 39–55%. Analysis of TEM images was used to quantify fringe length, tortuosity, and relative misorientation of planes, and indicated that neutron irradiation induced basal plane fragmentation and curvature. EELS was used to quantify the proportion of sp2 bonding and specimen density; a slight reduction in planar-sp2 content (due to the buckling basal planes and the introduction of non-six-membered rings) agreed with the observations from TEM.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Funding Information: | Funder Grant number EPSRC EP/I002588/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 16 May 2017 09:31 |
Last Modified: | 23 Jun 2023 22:29 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jnucmat.2017.05.011 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:116513 |