The permeation of D was studied by using the gas-phase breakthrough technique at between 100 and 500C, and pressures of between 10Pa and 100kPa. It was found that the data could be described by the Arrhenius parameters:
log[Do (m2/s)] = -6.94, E (eV) = 0.47
log[Po (mol/s m Pa½)] = -7.30, E (eV) = 0.58
The occurrence of D-trapping within the alloys appeared to affect the bulk diffusivity values.
D.J.Mitchell, E.M.Edge: Journal of Applied Physics, 1985, 57[12], 5226-35
Table 99
Bulk Diffusion Parameters for AISI304 Stainless Steel
Treatment | Do (cm2/s) | E (kJ/mol) |
as-received | 1.03 x 10-4 | 36.20 |
1.5h, 923K | 3.47 x 10-5 | 29.52 |
3.0h, 923K | 7.47 x 10-6 | 19.02 |