The segregation of C to the (100) surface of a (100) crystal slice was studied at 1600 to 2073K. The total amount of C in the crystal was maintained equivalent to 0.8 monolayers on each face. It was deduced that bulk diffusion was described by:

D (cm2/s) = 3 x 100 exp[-59(kcal/mol)/RT]

K.J.Rawlings, S.D.Foulias, B.J.Hopkins: Surface Science, 1981, 109[3], 513-21

The best linear fits to the solute diffusion data ([5] to [25]) yield:

H (sd): Ln[Do] = 1.49E – 21 (R2 = 0.87); W(sd): Ln[Do] = 0.33E – 16.1 (R2 = 0.63)