The diffusion of Ti and Nb radioactive tracers was studied simultaneously, at 950 to 1511C, by using standard lathe-sectioning techniques. The results for Ti could be described by:

D (cm2/s) = 4.54 x 10-4 exp[-31.30(kcal/mol)/RT]

A.E.Pontau, D.Lazarus: Physical Review B, 1979, 19[8], 4027-37

The best linear fits to the solute diffusion data ([1204] to [1206], [1226] to [1227], [1234] to [1237]) yield:

Al: Ln[Do] = 0.46E – 31.1 (R2 = 0.998); O: Ln[Do] = 0.28E – 11.8 (R2 = 0.77);

Ti: Ln[Do] = 0.25E – 17.1 (R2 = 0.85)