Abstract
The heavy-ion irradiation effects of nanocrystalline (78 nm) and microcrystalline (2 μm) Gd2Zr2O7 ceramics were comparatively studied by irradiation using 5 MeV Xe20+ with fluence of 4 × 1015 ions/cm2. The grazing incidence X-ray diffraction results demonstrate that the amorphization rate after irradiation decreases from 63.2% to 34.1% as the grain size increases from nanometer to micrometer. Combined with Raman analysis, the disorder of crystal structure after irradiation is mainly caused by the disorder of cations. The microstructure analysis confirms that the amorphization of nanocrystalline ceramic is more serious than microcrystalline counterpart after irradiation. In other words, the anti-irradiation performance of Gd2Zr2O7 microcrystalline ceramic should be better than the nanocrystalline counterpart.
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