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Communication Dans Un Congrès Année : 2023

Stability of radiation-induced bixbyite phase in δ-Sc4Hf3O12

Résumé

Oxide ceramics are the candidate materials for encapsulating minor actinides. Since the decay of radioactive elements generates a large amount of heat and radiation, knowledge on structural changes and stability under radiation environments is required. Oxygen-deficient fluorite structural derivatives have attracted attention for their radiation effects, because oxide ceramics with a fluorite type structure are known to exhibit excellent radiation resistance. We have recently performed swift heavy ion irradiation into δ-Sc4Hf3O12 and found the formation of a metastable phase with a bixbyite (C-rare-earth) structure [1]. However, the stability of this structure is not well understood. In the present study, we examined the effects of heat treatment and electron beam irradiation on the bixbyite phase. [1] M. Iwasaki, Y. Kanazawa, D. Manago, M. K. Patel, G. Baldinozzi, K. E. Sickafus, and M. Ishimaru, J. Appl. Phys. 132, 075901 (2022).
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hal-04052958 , version 1 (30-03-2023)

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  • HAL Id : hal-04052958 , version 1

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M. Iwasaki, Y. Kanazawa, D. Manago, Maulik K. Patel, Gianguido Baldinozzi, et al.. Stability of radiation-induced bixbyite phase in δ-Sc4Hf3O12. MS&T23: Materials Science & Technology, ACerS; AIST; TMS, Oct 2023, Columbus, OH, United States. ⟨hal-04052958⟩
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