Diffusion of chromium in chrysoberyl |
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| Authors: | Yong-Kil Ahn Jin-Gyo Seo Jong-Wan Park |
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| Affiliation: | 1. Department of Materials & Chemical Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea;2. Division of Materials Science & Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea |
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| Abstract: | Cr3+ diffusion in chrysoberyl (BeAl2O4) irradiated by H+ ions and electrons has been studied and compared with diffusion in non-irradiated samples. Chrysoberyl crystals were irradiated with 6 MeV H+ ions to fluencies of 1×1016 cm–2 for 25 min and with 10 MeV electrons to fluencies of 2×1017 cm–2 for 1 h. Three different types of samples, which were doped with Cr3+, were annealed in horizontal alumina tube furnaces by 50 K intervals in the temperature range from 1773 to 1923 K for 200 h. Scanning electron microscope–energy dispersive X-ray spectrometer (SEM–EDX) was used to measure the diffusion. Arrhenius equations for the diffusion coefficient for Cr3+ in the temperature range 1773–1923 K were developed: |
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| Keywords: | 61.72.S 66.30xj 67.80dj |
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