Microstructure evolution in 200-MeV Xe ion irradiated CeO<subscript>2</subscript> doped with Gd<subscript>2</subscript>O<subscript>3</subscript>.
In: Journal of Applied Physics, Jg. 132 (2022-12-21), Heft 23, S. 1-13
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Zugriff:
The microstructure of virgin and heavy ion-irradiated Ce 1–x Gd x O 2–x/2 with a wide range of Gd dopant concentrations (0 ≤ x Gd ≤ 0.5) was evaluated by x-ray diffraction (XRD), micro-Raman spectroscopy, and transmission electron microscopy (TEM) for selected area electron diffraction (SAED) analysis and plane-view bright-field (BF) imaging of ion tracks. The Ce 1–x Gd x O 2–x/2 samples were irradiated with 200-MeV Xe 14+ ions up to fluences from 3 × 10 11 to 1 × 10 13 cm −2 at ambient temperature. XRD patterns of the virgin Ce 1–x Gd x O 2–x/2 samples showed saturation of lattice parameter and relaxation of microstrain in Ce 1–x Gd x O 2–x/2 which are attributed to the increasing Gd concentration. Moreover, micro-Raman spectroscopy and SAED patterns revealed the bixbyite (C-type) structure formation and oxygen vacancy ordering for x Gd > 0.2 that is induced by dispersed C-type domains in the fluorite-structured (F-type) matrix. In the irradiated samples, asymmetric XRD peaks induced by lattice distortion were observed together with ion tracks in BF-TEM images. The radiation damage was recovered with the increase of Gd concentration. There is a rapid reduction of radiation damage cross section for x Gd > 0.2 with a reduction of the C-type structure reflections in XRD and SAED patterns. [ABSTRACT FROM AUTHOR]
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Titel: |
Microstructure evolution in 200-MeV Xe ion irradiated CeO<subscript>2</subscript> doped with Gd<subscript>2</subscript>O<subscript>3</subscript>.
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Autor/in / Beteiligte Person: | Seo, Pooreun ; Yasuda, Kazuhiro ; Matsumura, Syo ; Ishikawa, Norito ; Gutierrez, Gaëlle ; Costantini, Jean-Marc |
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Zeitschrift: | Journal of Applied Physics, Jg. 132 (2022-12-21), Heft 23, S. 1-13 |
Veröffentlichung: | 2022 |
Medientyp: | academicJournal |
ISSN: | 0021-8979 (print) |
DOI: | 10.1063/5.0121951 |
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