The diffusion of Zr in the β phase was investigated at 1770 to 1870K. The results could be described by:

D (cm2/s) = 1.70 x 104 exp[-91.7(kcal/mol)/RT]

V.A.Gorokhov, T.T.Dedegkaev, J.L.Ilyin, V.A.Moshnikov, A.S.Petrov, J.M.Sosov, I.C.I.Okafor: Acta Metallurgica, 1987, 35[3], 759-64