Microstructural characterization of. cap alpha. -Al/sub 2/O/sub 3/ implanted with iron
The microstructural and compositional changes produced in the near surface region of single crystals of ..cap alpha..-Al/sub 2/O/sub 3/ by ion-implantation with iron have been investigated by a number of complementary techniques, including Rutherford backscattering spectroscopy (RBS), conversion-electron Moessbauer spectroscopy (CEMS), analytical electron microscopy (AEM), and scanning transmission electron microscopy (STEM). Iron precipitates, 1 to 3 nm in diameter, have been identified in as-implanted material at depths corresponding to the peak in the deposited iron concentration profile. The same techniques have been used to monitor the redistribution of iron and the corresponding changes in valence state during post-implantation annealing. Electron microscopy has been to correlate RSB and CEMS results with the microstructural development. 9 refs., 4 figs., 1 tab.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6593323
- Report Number(s):
- CONF-881155-38; ON: DE89006037
- Country of Publication:
- United States
- Language:
- English
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ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CRYSTAL STRUCTURE
CRYSTALS
DIFFUSION
DISTRIBUTION
ELEMENTS
ION IMPLANTATION
IRON
IRON COMPOUNDS
IRON OXIDES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METALS
MICROSTRUCTURE
MINERALS
MONOCRYSTALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SPINELS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VALENCE