A double-cell electrochemical technique was used to study H permeation in the amorphous alloy. The H diffusivity versus H composition relationship was determined (table 297). The H diffusivity increased substantially with increasing H content. This implied a broad range of energy states for H incorporation in the amorphous material. A key experimental feature was the sputter deposition of a thin passivating surface film immediately after sputter deposition of the Cu-Ti films. A substantial uptake of H was observed in these alloys, with H/(Cu+Ti) ratios as high as 0.7.

Y.S.Lee, D.A.Stevenson: Journal of Non-Crystalline Solids, 1985, 72[2-3], 249-66

Table 296

Self-Diffusion Coefficients for Ti-5Al-2.5wt%Sn