We report the first straightforward measurements of the diffusion coefficient of
hydrogen migrating in icosahedral (i-) quasicrystal ribbons of Ti45Zr38Ni17
and in two-phase bulk samples containing both the i-phase and the Laves phase.
It is found that at 273–353 K diffusion obeys Arrhenius’s law with activation
energy 0.24 eV and that the ratio of the volumes of the phases changes at
hydrogenization.
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