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2004
Interface equilibria
G 6000
Gaseous Hydrogen Charging of Zr—Cu—Ni—Al Glasses and Quasicrystals. —
absorption in amorphous and quasicrystalline Zr69.5Cu12Ni 11Al 7.5 and the in48- 022 Hydrogen
fluence of the microstructure on hydrogenation are characterized by XRD, TEM, and
DSC. Microstructural changes during hydrogenation of partially quasicrystalline
Zr69.5Cu12 Ni11Al7.5 from the gas phase, i.e. the formation of hydrides, depend on the volume fraction of the quasicrystalline phase, suggesting preferred nucleation of ZrH2 at
the amorphous/quasicrystalline interface. The lack of any transformation of the quasicrystalline phase into approximants or amorphization as observed during electrochemical hydrogenation at room temperature is explained by annealing-out of defects at the
hydrogenation temperature of 250 °C. — (HUETT, V. T.; ZANDER, D.; JASTROW,
L.; MAJZOUB, E. H.; KELTON, K. F.; KOESTER*, U.; J. Alloys Compd. 379
(2004) 1-2, 16-22; Dept. Biochem. Chem. Eng., Univ. Dortmund, D-44221 Dortmund,
Germany; Eng.) — W. Pewestorf
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