The impurity diffusion of 60Co in V was measured (table 308):

D (m2/s) = 0.7 x 10-4 exp[-283(kJ/mol)/RT]

The impurity enhancement which was observed was analyzed by using linear, polynomial and exponential functions which related the diffusivity of the solute to its concentration. It appeared that the higher terms in the concentration of the polynomial function could not be neglected in the case of Co diffusion in V.

J.Pelle: Philosophical Magazine A, 1995, 72[6], 1547-57

Table 308

Diffusion Coefficients for 60Co in V