Heavy ion irradiation-induced phase transformation in polycrystalline Dy2O3
Heavy ion irradiation-induced phase transformation in polycrystalline Dy2O3
复制标题
重离子辐照诱导多晶 Dy2O3 相变
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
K. Sickafus
中科院分区：
文献类型：
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作者：
M. Tang;P. Lu;J. Valdez;K. Sickafus
采用掠入射X射线衍射（GIXRD）和透射电镜（TEM）相结合的方法，研究了300 keV Kr2+离子辐照稀土氧化物Dy2O3多晶颗粒的辐照损伤效应。在低温下，使用300 keV的Kr2+离子引入辐射损伤，通量高达1 × 1020 Kr m−2。GIXRD和横截面TEM观察表明，照射后的Dy2O3的晶体结构从立方的，所谓的C型稀土倍半氧化物结构转变为单斜的，B型稀土倍半氧化物结构的离子照射。此外，TEM和高分辨电子显微镜（HREM）表明，转换的表面Dy2O3层采用与衬底Dy2O3的外延取向关系。
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.