The diffusivity of cadmium into single crystals of copper has been measured in the temperature range from 725°C to 950°C using radioactive isotope Cd 115 as a tracer. The results indicate that D 0 =0.935 cm 2 /sec and H =45,700 cal/mol. These values are compared with the corresponding values for the diffusion of zinc into copper in order to investigate the effect of the difference in atomic radii.
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Hirone et al. (1958) studied this question.
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