The diffusion of Bi along various [001] symmetrical tilt boundaries in bi-crystals was measured as a function of the misorientation. It was found that the diffusivity on a boundary was closely related to the energy of that boundary. That is, a lower-energy boundary was associated with a lower diffusivity.
Misorientation Dependence of Diffusion of Bi in [001] Symmetric Tilt Boundaries of Cu R.Monzen, Y.Takada, K.Kita: Journal of Materials Science Letters, 1998, 17[2], 283-4