Self-diffusion and diffusion of cobalt in alpha and delta-iron

Diffusion measurements in pure iron have been made in the temperature ranges 683 to 884°c and 1428 to 1521°c. The following expressions for diffusion coefficients, D, are deduced from least mean squares analyses of the results: A single Arrhenius equation describes the diffusion data obtained above the Curie temperature. Alternative corrections for absorption of radiation in the residual activity technique are compared and the origin of diffusion ‘tails’ is discussed.