Thermal stability and hydrogen permeation of Ni42Zr 30Nb28-xTax amorphous alloys

J. B. Qiang, W. Zhang, S. Yamaura, A. Inoue

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    9 Citations (Scopus)


    The thermal stability and hydrogen permeability of Ni42Zr 30Nb28-xTax (x=0,7,14,21,28) amorphous alloys have been studied in the present work. The substitution of Nb by Ta was found to be effective in improving the thermal stability of the Ni42Zr 30Nb28 amorphous alloy. The onset crystallization temperature of the Ni42Zr30Nb28-xTax amorphous alloys was increased by 58 K from 807 K for Ta-free composition to 865 K for Ni42Zr30Ta28 due to the Ta addition. The hydrogen permeability of the Pd-coated Ni42Zr30Ta 28 amorphous membrane was measured to be about 0.86 × 10 -8 mol·m-1 ·s-1 ·Pa -1/2 at 673 K, which is slightly lower than that of the Pd-coated Ni42Zr30Nb28 amorphous membrane. The hydrogen permeability of the Ni42Zr30Ta28 amorphous membrane was revealed to be more temperature dependent in comparison to that of the reference membrane. The higher thermal stability combined with good hydrogen permeability give rise to the possibility of the practical use for Ni 42Zr30Ta28 amorphous alloy as a dense metal membrane operating at higher temperatures.

    Original languageEnglish
    Pages (from-to)1236-1239
    Number of pages4
    JournalMaterials Transactions
    Issue number6
    Publication statusPublished - 2009 Jun


    • Amorphous alloy
    • Hydrogen permeation
    • Thermal stability

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering


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