Direct determination of the self-diffusion mechanism in bccβ-titanium
- 15 March 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 39 (8) , 5025-5034
- https://doi.org/10.1103/physrevb.39.5025
Abstract
With quasielastic neutron scattering the elementary diffusion jump (length and direction) and the jump frequency in bcc β-Ti single crystals have been determined at temperatures between 1460 and 1580 °C. Supplementary measurements on polycrystalline samples extended the temperature region down to 1100 °C. The elementary diffusion jump is a jump into a nearest-neighbor vacancy. An admixture of 10–15 % jumps into next-nearest-neighbor vacancies is compatible with the experiments. Comparison of derived diffusivities with results from tracer measurements shows satisfactory agreement.Keywords
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