Electron microscopy studies of void swelling and annealing of voids in aluminium irradiated with aluminium ions |
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Authors: | U. Engman B. Holmqvist |
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Affiliation: | The Studsvik Science Research Laboratory , S-611 82, Nyk?ping, Sweden |
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Abstract: | Abstract MgO single crystals implanted with Au+ ions (180 keV, 6 1016-1017 ions cm?2) and annealed at temperatures between 25°C and 1100°C, have been analysed—by optical spectrophotometry—by Rutherford back-scattering (to confirm the effective presence and to study the distribution profile of Au atoms), and by TEM and X-ray diffraction (to identify the phases precipitated by thermal treatment). Thermal annealing between 550°C and 1100°C produced an optical absorption band located between 565 nm and 600 nm. This band can be attributed to a fee Au precipitate with diameter varying from 50 to 200 Å. Larger metallic colloids 1000 Å are in simple orientation with the matrix. Annealing at temperatures higher than 500°C produces a supplementary optical absorption located at 425 nm. This band can be attributed to Au plasma resonance. After annealing for 15 min at 1100°C, a new phase is detected by X-ray diffraction and TEM and identified as Au3Mg alloy with hexagonal structure. |
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Keywords: | Radiation effects Fluoroapatite Strontium titanate Defect recovery |
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