Structural analysis of swift heavy ion irradiated β-Sc2Hf7O17 and γ-Sc2Hf5O13 - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Communication Dans Un Congrès Année : 2024

Structural analysis of swift heavy ion irradiated β-Sc2Hf7O17 and γ-Sc2Hf5O13

Résumé

Complex oxides have attracted attention as a candidate for nuclear waste immobilization materials to replace borosilicate glass. Knowledge of radiation-induced structural changes is of technological importance for developing the container materials. In this study, we performed 94 MeV Pb ion irradiation into β-Sc2Hf7O17 and γ-Sc2Hf5O13 pellets at room temperature, and examined their structural changes by grazing x-ray diffraction (GIXRD) and transmission electron microscopy (TEM). Polycrystallization occurs at the surface of β-Sc2Hf7O17, while the crystallinity was maintained in γ-Sc2Hf5O13: the former was more susceptible to radiation damage than the latter. The ordered rhombohedral β- and γ-phases transformed to disordered cubic fluorite phase with increasing ion fluence. A domain structure was observed in β-Sc2Hf7O17, and the interface between the ordered and disordered regions was found to be related to the domain boundary.
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Dates et versions

hal-04554575 , version 1 (22-04-2024)

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Paternité - Pas d'utilisation commerciale

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  • HAL Id : hal-04554575 , version 1

Citer

Y Noguchi, Masanari Iwasaki, Manabu Ishimaru, Maulik K. Patel, Gianguido Baldinozzi, et al.. Structural analysis of swift heavy ion irradiated β-Sc2Hf7O17 and γ-Sc2Hf5O13. The Materials Science & Technology (MS&T24) meeting, Oct 2024, Pittsburg, United States. ⟨hal-04554575⟩
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