The diffusion of Fe was studied by using serial sectioning and autoradiographic techniques at 1020 to 1500K. The bulk diffusivity could be described by:

D (cm2/s) = 3.26 x 10-1 exp[-259.6(kJ/mol)/RT]

A.R.Paul, M.C.Naik, K.N.G.Kaimal: Materials Science and Technology, 1991, 7[1], 8-11