Abstract
The isotope effect for the diffusion of copper in aluminum is 0.81 +- 0.05 at 656.9 /sup 0/C and 0.89 +- 0.05 at 584.7 /sup 0/C. The isotope effect for the diffusion of zinc in aluminum increases from approx. 0.35 at 415 /sup 0/C to approx. 0.6 at 654 /sup 0/C with a temperature dependence of 0.1 eV. These results and earlier diffusion data indicate that the impurity-vacancy binding energy is small in aluminum, but they do not resolve the controversy concerning the extent of the divacancy contribution to self-diffusion in aluminum.
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