The bulk diffusivity of 59Fe exhibited a slight decrease, for Si contents of up to 2at%, followed by an increase. The present results could be described by:

1.48at%Si:     D (cm2/s) = 1.03 x 100 exp[-276(kJ/mol)/RT]

1.87at%Si:     D (cm2/s) = 7.67 x 101 exp[-276(kJ/mol)/RT]

6.55at%Si:     D (cm2/s) = 5.20 x 100 exp[-242(kJ/mol)/RT]

8.64at%Si:     D (cm2/s) = 4.93 x 100 exp[-236(kJ/mol)/RT]

12.1at%Si:     D (cm2/s) = 8.00 x 10-1 exp[-213(kJ/mol)/RT]

D.Treheux, L.Vincent, P.Guiraldenq: Acta Metallurgica, 1981, 29[5], 931-8