The diffusion of 63Ni in Fe-17Cr-12wt%Ni was studied at 600 to 1250C (table 93). The use of a radio-frequency sputtering technique for serial sectioning permitted the determination of very small bulk diffusion coefficients at the lowest temperatures. The bulk diffusion of Ni in the alloys was found to be much slower than in pure Fe or in austenitic stainless steel at similar temperatures.

R.A.Perkins: Metallurgical Transactions, 1973, 4[7], 1665-9

 

Table 92

Grain Boundary Diffusion Parameters for Fe-18Cr-10Ni

 

Temperature (C)

Sample

Do (cm2/s)

E (kJ/mol)

730-1000

S-doped

1.96 x 10-2

296

730-1000

undoped

1.83 x 10-5

231