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Simulating radiation damage in a bcc Fe system with embedded yttria nanoparticles

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journal contribution
posted on 30.11.2015 by Tomas Lazauskas, Steven Kenny, Roger Smith, Gurpree Nagra, Mana Dholakia, M.C. Valsakumar
We present a molecular dynamics study of radiation damage arising from nuclear collisions close to embedded yttria nanoparticles in a bcc Fe matrix. The model assumes a perfect body-centred cubic (bcc) iron matrix in which yttria nano-particles are embedded as a simplified model of an Oxide Dispersion Strengthened steel. It is shown how the nano-particles interact with nearby initiated collision cascades, through cascade blocking and absorbing energy. Fe defects accumulate at the interface both directly from the ballistic collisions and also by attraction of defects generated close by. The nano-particles generally remain intact during a radiation event and release absorbed energy over times longer than the ballistic phase of the collision cascade.

Funding

The work was funded by EPSRC grant EP/I01240.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

JOURNAL OF NUCLEAR MATERIALS

Volume

437

Issue

1-3

Pages

317 - 325 (9)

Citation

LAZAUSKAS, T. ...et al., 2013. Simulating radiation damage in a bcc Fe system with embedded yttria nanoparticles. Journal of Nuclear Materials, 437(1-3), pp. 317-325.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2013

Notes

This paper was accepted for publication in the journal Journal of Nuclear Materials and the definitive published version is available at http://dx.doi.org/10.1016/j.jnucmat.2013.02.016

ISSN

0022-3115

Language

en

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