The impurity diffusion of 60Co in V was measured at 5 concentrations; including 0%Co. The activation energies for these alloys were found to range from 283 to 226kJ/mol in going from 0 to 2at%Co:

0%Co:     D(m2/s) = 0.7 x 10-4 exp[-283(kJ/mol)/RT]

0.5%Co:     D(m2/s) = 0.8 x 10-4 exp[-292(kJ/mol)/RT]

1%Co:     D(m2/s) = 0.4 x 10-4 exp[-281(kJ/mol)/RT]

1.5%Co:     D(m2/s) = 0.1 x 10-4 exp[-263(kJ/mol)/RT]

2%Co:     D(m2/s) = 0.6 x 10-4 exp[-226(kJ/mol)/RT]

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