A technique based upon surface coverage kinetic measurements was used for the determination of intergranular diffusion. It was limited to systems in which the solute segregated strongly at grain boundaries and free surfaces. By using this technique, intergranular S diffusion in Ni was shown to be described by:

D (m2/s) = 2.7 x 10-9exp[-58700/RT]

at 723 to 1073K.

R.Le Gall, E.Quérard, G.Saindrenan, H.Mourton, D.Roptin: Scripta Materialia, 1996, 35[10], 1175-81