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Journal Articles Journal of the European Ceramic Society Year : 2019

In situ TEM observations of ion irradiation damage in boron carbide

Abstract

This paper presents an in situ Transmission Electron Microscopy (TEM) study of the damage formation process in ion-irradiated boron carbide used as neutron absorber for fast nuclear reactors. We focused our experiment on the damage induced by 1 MeV gold ions irradiation performed on the JANNuS-Orsay in situ dual ion beam TEM facility. The effects of the crystallographic orientation and the temperature (RT, 500 °C and 800 °C) on the ion-irradiated boron carbide structure were studied. The different steps of damage formation leading to amorphization are described. At RT, material amorphization is observed at a damage dose threshold around 7.5 displacements per atom (dpa). It is also shown that no amorphization occurred when irradiation is performed at 500 °C or 800 °C up to the highest fluence studied (3 × 1015 ions cm−2, i.e. 7.6 dpa).

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Materials
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Dates and versions

hal-01976926 , version 1 (21-10-2021)

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Attribution - NonCommercial

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Guillaume Victor, Yves Pipon, Nathalie Moncoffre, Nicolas Bererd, Claude Esnouf, et al.. In situ TEM observations of ion irradiation damage in boron carbide. Journal of the European Ceramic Society, 2019, 39, pp.726-734. ⟨10.1016/j.jeurceramsoc.2018.11.011⟩. ⟨hal-01976926⟩
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