A study of oxygen self-diffusion in the C-direction of rutile using a nuclear technique |
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Authors: | D.J. Derry D.G. Lees J.M. Calvert |
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Affiliation: | Metallurgy Department, The University, Manchester, M 13 9PL, England;Physics Department, The University, Manchester, M 13 9PL, England |
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Abstract: | Oxygen-18 has been used as a tracer to study diffusion in the c-direction of rutile single crystals in the temperature range 1173–1473K. The distribution of the tracer was determined by means of a nuclear technique. The diffusion coefficient can be represented in this temperature range by the equation . A diffusion coefficient obtained at 1673 K using a different technique agrees well with the value obtained by extrapolation from the other results. Consideration of the results from specimens with different impurity concentrations leads to the conclusion that the diffusion which has been studied is extrinsic.The results obtained in this investigation are in good agreement with those of Haul and Dümbgen[l] and (by extrapolation) Gruenwald and Gordon [2] but not with those of Doskocil and Pospisil[3] and Bagshaw and Hyde[4]. |
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