Structure and radiation effect of Er-stuffed pyrochlore Er2(Ti2−xErx)O7−x/2 (x = 0–0.667)
作者： D.Y. Yang , C.P. Xu , E.G. Fu , J. Wen , C.G. Liu
DOI: 10.1016/J.NIMB.2015.04.058
关键词: Diffraction 、 Swelling 、 Ceramic 、 Irradiation 、 Amorphous solid 、 Radiation effect 、 Pyrochlore 、 Ion 、 Crystallography 、 Materials science
摘要: Abstract Er-stuffed pyrochlore series Er2(Ti2−xErx)O7−x/2 (x = 0, 0.162, 0.286, 0.424 and 0.667) were synthesized using conventional ceramic processing procedures. The structure of is effectively tailored by the Er stuffing level (x). In order to study radiation effect pyrochlores, irradiation experiments performed with 400 keV Ne2+ ions fluences ranging from 5 × 1014 3.0 × 1015 ions/cm2 at cryogenic condition. Irradiation induced microstructural evolution was examined a grazing incidence X-ray diffraction technique. It found that irradiated layer undergoes significant lattice disordering swelling ⩽1.5 × 1015 ions/cm2 amorphization ⩾1.5 × 1015 ions/cm2. depends strongly on chemical compositions samples. Both percentage amorphous fraction decrease increasing x. experimental results are discussed in context cation antisite defect. defect formation energy which varies as function x responsible for difference structural behaviors under ion irradiation.
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