The membrane permeability technique was used to study the diffusion of H. The results (table 8) could be fitted by the Arrhenius equation:

D (m2/s) = 8.55 x 10-7 exp[-3620/T]

H.Katsuta, R.B.McLellan: Scripta Metallurgica, 1979, 13[1], 65-6

 

Table 6Grain Boundary Diffusivity of 105Ag in Ag Polycrystals

 

Temperature (K)

D (m2/s)

455

2.57 x 10-14

424

2.24 x 10-14

394

3.84 x 10-15

353

1.16 x 10-16