The diffusivity of 63Ni was determined at 900 to 1675C by using tracer and sectioning techniques. The results could be described by:

D (cm2/s) = 1.8 x 10-1 exp[-63.4(kcal/mol)/RT]

The behavior of Ni was similar to that of Co, but different to that of Fe and V; where non-Arrhenius behavior was observed. The differences were attributed to the smaller number of divacancies present, in the case of Ni and Co, due to strong electrostatic interactions between the Ni or Co and monovacancies.

J.Pelleg: Philosophical Magazine A, 1986, 54[1], L21-9