Standard permeation equipment and manometric measurements were used to determine H diffusion and permeation data. The results could be summarised by:
bulk: D (cm2/s) = 2.52 x 10-3 exp[-7.96(kcal/g-atom)/RT]
grain boundaries: D (cm2/s) = 2.27 x 10-3 exp[-8.2(kcal/g-atom)/RT]
V.M.Sidorenko, I.I.Sidorak: Fiziko-Khimicheskaya Mekhanika Materialov, 1973, 9[4], 12-6
Table 96
Room-Temperature H Diffusivities in Ni
Condition | Route | D (cm2/s) |
annealed (1050C) | lattice | 3.52 x 10-10 |
annealed (1050C) | grain boundary | 2.05 x 10-8 |
aged (600C, 1h) | lattice | 3.38 x 10-10 |
aged (600C, 1h) | grain boundary | 2.13 x 10-8 |