Heavy ion irradiation-induced phase transformation in polycrystalline Dy2O3 |
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| Authors: | M. Tang P. Lu J. A. Valdez |
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| Affiliation: | 1. Department of Materials Engineering , New Mexico Institute of Mining and Technology , Socorro, NM 87801, USA;2. Materials Science and Technology Division , Los Alamos National Laboratory , Los Alamos, NM 87545, USA;3. Department of Materials Engineering , New Mexico Institute of Mining and Technology , Socorro, NM 87801, USA;4. Materials Science and Technology Division , Los Alamos National Laboratory , Los Alamos, NM 87545, USA |
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| Abstract: | Radiation damage effects in polycrystalline pellets of the rare earth sesquioxide Dy2O3 irradiated with 300?keV Kr2+ ions were studied by combining grazing incidence X-ray diffraction (GIXRD) with transmission electron microscopy (TEM). Radiation damage was introduced using 300?keV Kr2+ ions to fluences up to 1?×?1020?Kr?m?2 at cryogenic temperature. GIXRD and cross-sectional TEM observations revealed that the crystal structure of the irradiated Dy2O3 transformed from a cubic, so-called C-type rare earth sesquioxide structure to a monoclinic, B-type rare earth sesquioxide structure upon ion irradiation. In addition, TEM and high-resolution electron microscopy (HREM) indicated that the transformed surface Dy2O3 layer adopts an epitaxial orientation relationship with the substrate Dy2O3. |
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