The diffusive behavior of 91Y at 1200 to 1500C was studied. The results could be described by:
D (cm2/s) = 1.2 x 10-1 exp[-72.2(kcal/mol)/RT]
D.S.Gornyi, R.M.Altovskii: Fizika Metallov i Metallovedenie, 1971, 31[4], 781-5