| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1679729 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2016 | 5 Pages |
•Nanocrystalline yttria synthesized by low temperature sol gel method.•120 MeV Ag ion induced phase transformation from cubic to monoclinic crystal structure.•XRD shows monoclinic lattice plane (402¯).•Raman spectroscopy confirmed the monoclinic mode vibrations.•HR-TEM confirmed the damaged in Y2O3 lattice under SHI irradiation.
Sol gel derived nanocrystalline yttria pellets are irradiated with 120 MeV Ag9+ ions for fluence in the range 1 × 1012–3 × 1013 ions cm−2. Pristine and irradiated samples are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and Raman spectroscopy. XRD pattern of pristine Y2O3 nanocrystal reveal cubic structure. A new XRD peak at 30.36° is observed in pellet irradiated with 1 × 1013 ions cm−2. The peak at 30.36° is corresponding to (402¯) plane of monoclinic phase. The diffraction intensity of (402¯) plane increases with Ag9+ ion fluence. Raman spectrum of pristine pellet show bands corresponding to cubic phase. And, ion irradiated sample show new peaks at 410, 514 and 641 cm−1 corresponding monoclinic phase. HR-TEM and SAED pattern of ion irradiated sample confirmed the presence of monoclinic phase. Hence, it is confirmed that, 120 MeV Ag9+ ions induce phase transformation in nanocrystalline Y2O3.
