Internal oxidation methods were used to study O diffusion at 1223 to 1373K. The results could be described by:

D (m2/s) = 1.30 x 10-4 exp[-166(kJ/mol)/RT]

J.Takada, S.Yamamoto, S.Kikuchi, M.Adachi: Metallurgical Transactions A, 1986, 17[2], 221-9