Atomic absorption analysis was used to study the impurity diffusion of Cu at 1080 to 1613K. It was found that the results could be described by:

D (cm2/s) = 6.1 x 10-1 exp[-60.7(kcal/mol)/RT]

O.Taguchi, Y.Iijima, K.Hirano: Journal of the Japan Institute of Metals, 1984, 48[1], 20-4