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 7Pipe Diffusivity of Ag Isotopes in Ag Polycrystals
Temperature (K) | Isotope | D (m2/s) |
455 | 105Ag | 5.26 x 10-15 |
424 | 105Ag | 4.64 x 10-15 |
424 | 110mAg | 4.03 x 10-15 |
394 | 105Ag | 1.12 x 10-15 |
394 | 110mAg | 3.36 x 10-15 |
Table 8
Diffusivity of H in Ag
Temperature (K) | D (m2/s) |
947 | 1.83 x 10-8 |
973 | 2.17 x 10-8 |
1027 | 2.44 x 10-8 |
1060 | 2.75 x 10-8 |
1085 | 3.00 x 10-8 |
1123 | 3.49 x 10-8 |
Figure 1
Grain-Boundary Diffusivity of Ni in Ag