Diffusion of hydrogen in Ti–Zr–Ni quasicrystals

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 l...

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Veröffentlicht in:	Journal of physics. Condensed matter 2003-07, Vol.15 (29), p.5001-5008
Hauptverfasser:	Azhazha, V, Grib, A, Khadzhay, G, Malikhin, S, Merisov, B, Pugachov, A
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Condensed matter: structure, mechanical and thermal properties Diffusion in solids Diffusion of impurities Exact sciences and technology Metals. Metallurgy Physics Transport properties of condensed matter (nonelectronic)
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Zusammenfassung:	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.
ISSN:	0953-8984 1361-648X
DOI:	10.1088/0953-8984/15/29/311