Role of surface diffusion in formation of unique reactivity for graphite oxidation: Time-resolved measurements in a pulsed diffusion reactor

Autor: William E. Windes, Rakesh Batchu, Rebecca Fushimi, Eric J. Dufek, Zongtang Fang, Zachary J. Thompson

Publikováno v: Carbon. 182:781-790

Quantification of oxidation kinetics is essential to develop graphitic materials for diverse applications: from refractories found in gas-cooled nuclear reactors to catalysts needed for chemical manufacturing. Using well-defined highly oriented pyrol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9ac4fd59cc07138dacc33137a286ef7d
https://doi.org/10.1016/j.carbon.2021.06.061

A macro-scale ruck and tuck mechanism for deformation in ion-irradiated polycrystalline graphite

Autor: William E. Windes, Meimei Li, Dong Liu, Martin Kuball, Joshua J. Kane, Steve Johns, Junliang Liu, Yan Zhou, David Cherns, Wei-Ying Chen, Ian M. Griffiths, Chinnathambi Karthik

Publikováno v: Carbon. 173:215-231

A vein structure, which becomes more pronounced with increasing ion dose, was found on the surface of polycrystalline HOPG (highly oriented pyrolytic graphite) implanted by ex situ C+ (up to 1.8 × 1017 ions/cm2), and in situ Ar+ in a transmission el

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9507b1b50c16465a3245b224dde1b9b4
https://doi.org/10.1016/j.carbon.2020.10.086

Effects of air oxidation on the evolution of surface area within nuclear graphite and the contribution of macropores

Autor: Austin C. Matthews, W. David Swank, William E. Windes, Joshua J. Kane

Publikováno v: Carbon. 166:291-306

Reactive surface area and its evolution play an important role in the oxidation behavior of porous carbon materials. Here, the evolution of reactive surface area within nuclear graphite grades NBG-18, IG-110, and PCEA were examined using chronic oxid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e5c439bae3602921f61be83b1c2f38e7
https://doi.org/10.1016/j.carbon.2020.05.018

Experimental evidence for ‘buckle, ruck and tuck’ in neutron irradiated graphite

Autor: William E. Windes, Chinnathambi Karthik, Steve Johns, Lingfeng He, Rick Ubic, Joshua J. Kane

Publikováno v: Carbon. 159:119-121

The current mainstream theory for radiation-induced dimensional change of nuclear graphite is based on the notion that interstitially displaced carbon atoms will coalesce into dislocation loops (i.e., additional basal planes). This standard atomic-di

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https://doi.org/10.1016/j.carbon.2019.12.028

Characterisation of the spatial variability of material properties of Gilsocarbon and NBG-18 using random fields

Autor: William E. Windes, Paul Mummery, José David Arregui-Mena, D. V. Griffiths, Lee Margetts, Mark C. Carroll, Philip D. Edmondson

Publikováno v: Arregui-Mena, J, Edmondson, P D, Margetts, L, Griffiths, D V, Windes, W E, Carroll, M & Mummery, P 2018, ' Characterisation of the spatial variability of material properties of Gilsocarbon and NBG-18 using random fields ', Journal of Nuclear Materials . https://doi.org/10.1016/j.jnucmat.2018.09.008

Graphite is a candidate material for Generation IV concepts and is used as a moderator in Advanced Gas-cooled Reactors (AGR) in the UK. Spatial material variability is present within billets causing different material property values between differen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8236994d646b302d43cc2eeb495f4e2e
https://doi.org/10.1016/j.jnucmat.2018.09.008