MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Hydrogen Permeation of Eutectic Nb-Zr-Ni Alloy Membranes Containing Primary Phases
Tomoyuki TakanoKazuhiro IshikawaTsuyoshi MatsudaKiyoshi Aoki
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2004 Volume 45 Issue 12 Pages 3360-3362

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Abstract

Hydrogen permeability (φ) of eutectic Nb-Zr-Ni alloy membranes containing the primary phases ZrNi or bcc-(Nb, Zr) was measured using a gas flow meter. φ of the Nb10Zr45Ni45 alloy containing the primary ZrNi phase (16 vol%) was 2.35 × 10−8 [mol H2 m−1 s−1 Pa−0.5] at 673 K, while φ of the Nb20Zr40Ni40 alloy containing the primary bcc-(Nb, Zr) phase (18 vol%) was 2.73 × 10−8 [mol H2 m−1 s−1 Pa−0.5] at 673 K. These values were higher than that of pure Pd and of the Nb39Ti31Ni30 alloy that shows the highest φ value in the Nb-Ti-Ni system. The present work strongly supported our previous proposal that multiphase alloys containing eutectic structures, which suppress a hydrogen embrittlement, are promising as novel hydrogen permeation membranes.

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© 2004 The Japan Institute of Metals and Materials
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