The bulk diffusivity of Cu in the superalloy was studied at 1050 to 1500K by using the serial sectioning technique. It was found that the results could be described by:

D (cm2/s) = 5.02 x 10-1 exp[-269.1(kJ/mol)/RT]

A.R.Paul, M.C.Naik, K.N.G.Kaimal: Physica Status Solidi A, 1991, 128[1], 9-19