Diffusivity in GlidCop AL25 IG alloy was evaluated by using the gas permeation technique at 573 to 793K and high-purity hydrogen loading pressures from 103 to 1.5 x 105Pa. The diffusive transport was described by:

D(m2/s) = 5.70 x 10-5exp[-76.8(kJ/mol)/RT]

The trap density was 3.1 x 1022/m3 and the trapping energy was 75.4kJ/mol. The presence of ultrafine Al2O3 particles greatly affected the hydrogen isotope transport behaviour.

G.A.Esteban, G.Alberro, I.Peñalva, A.Peña, F.Legarda, B.Riccardi: Fusion Engineering and Design, 2009, 84[2-6], 757-61