Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation

Heggie, MI, Suarez-Martinez, I, Davidson, C and Haffenden, G (2011) Buckle, ruck and tuck: A proposed new model for the response of graphite to neutron irradiation Journal of Nuclear Materials, 413 (3). pp. 150-155.

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Abstract

The default theory of radiation damage in graphite invokes Frenkel pair formation as the principal cause of physical property changes. We set out its inadequacies and present two new mechanisms that contribute to a better account for changes in dimension and stored energy. Damage depends on the substrate temperature, undergoing a change at approximately 250 °C. Below this temperature particle radiation imparts a permanent, nano-buckling to the layers. Above it, layers fold, forming what we describe as a ruck and tuck defect. We present first principles and molecular mechanics calculations of energies and structures to support these claims. Necessarily we extend the dislocation theory of layered materials. We cite good experimental evidence for these features from the literature on radiation damage in graphite. © 2011 Elsevier B.V. All rights reserved.

Item Type:	Article
Authors :	Name Email ORCID Heggie, MI m.heggie@surrey.ac.uk Suarez-Martinez, I Davidson, C Haffenden, G
Date :	30 June 2011
Identification Number :	10.1016/j.jnucmat.2011.04.015
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 12:31
Last Modified :	17 May 2017 12:31
URI:	http://epubs.surrey.ac.uk/id/eprint/835648

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