The grain boundary diffusion of Co in [001]- and [011]-type symmetrical tilt bicrystals was studied (table 115). No preferential intergranular diffusion was observed. By taking account of the sensitivity and resolution of the electron microprobe analytical technique, it was estimated that the intergranular diffusion coefficient was less than 1000 times the lattice diffusion coefficient. It was certainly not of the order of 105 times the lattice diffusion coefficient; as had previously been reported.

F.Barbier, C.Monty, M.Déchamps: Philosophical Magazine A, 1988, 58[3], 475-90

Table 115

Diffusion of Co in NiO Bicrystals