Effect of a solute addition (Ta) on low temperature self-diffusion processes in gold

Self-diffusion measurements have been made in polycrystalline Au-1.2 at.% Ta alloy over the temperature range 204°-395.5 °C using 195Au radioactive tracer and r.f. backsputtering techniques for serial sectioning. Self-diffusion coefficients were obtained in the lattice, dislocation networks (subgrains) and large angle grain boundaries and these yielded Arrhenius parameters for the three diffusion processes. A small addition of Ta to Au was found to have profound effects on Au diffusion in the lattice and along grain boundaries. © 1975.