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The interpretation of surface damages in Al2O3, MgAl2O4 and MgO irradiated with energetic iodine ions
- Source :
-
Surface & Coatings Technology . Sep2002, Vol. 158/159, p444. 5p. - Publication Year :
- 2002
-
Abstract
- Samples of polycrstalline sintered ceramics of Al2O3, MgAl2O4 and MgO were irradiated at room temperature with 85 MeV I7+ ions to doses up to 1.2×1019 m2. Both MgAl2O4 and Al2O3 samples are observed to be amorphized up to depths of approximately 5–6 μm for a dose of 1.2×1019/m2, through a cross-sectional transmission electron microscopy (XTEM). No defected clusters are observed at approximately 7.5–8.5 μm, where displacement damage due to the nuclear energy deposition is predicted to peak at 1 dpa (displacement per atom). No amorphization is observed for the MgO sample irradiated with the same dose. Instead, X-ray diffractometry (XRD) revealed an enhancement of the diffraction peaks for the (200), and (400) reflections and a reduction of peak intensities from other reflections, as compared with those before irradiation. This indicates that an atomistic rearrangement may occur along an ion path to form a new surface with the lower energy. [Copyright &y& Elsevier]
- Subjects :
- *CERAMICS
*ALUMINUM oxide
Subjects
Details
- Language :
- English
- ISSN :
- 02578972
- Volume :
- 158/159
- Database :
- Academic Search Index
- Journal :
- Surface & Coatings Technology
- Publication Type :
- Academic Journal
- Accession number :
- 7868610
- Full Text :
- https://doi.org/10.1016/S0257-8972(02)00271-2