An investigation was made of H permeation in melt-spun Zr65Al7.5Ni10Cu12.5Pd5 in the supercooled liquid, quasi-crystalline particle-dispersed glassy and crystalline states. The H permeability was highest in the supercooled liquid state and was lowest in the crystalline state. The H permeability of the melt-spun alloy, consisting of quasi-crystalline particles dispersed in the glassy state, was intermediate between the single-phase glassy and crystalline alloys. This was assumed to be because the Zr content in the residual glassy phase decreased after primary precipitation of the icosahedral-phase (i-phase); resulting in a decrease in the H permeability.

Hydrogen Permeation of the Zr65Al7.5Ni10Cu12.5Pd5 Alloy in Three Different Microstructures. S.Yamaura, S.Nakata, H.Kimura, A.Inoue: Journal of Membrane Science, 2007, 291[1-2], 126-30