Hydrogen Enhancement of Interlayer Reaction in Ni/V Bilayer

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  • Tanaka Kazuhide
    Department of Materials Science and Engineering, Nagoya Institute of Technology
  • Nagai Kosuke
    Department of Materials Science and Engineering, Nagoya Institute of Technology

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X-ray diffraction and Auger-electron spectroscopy depth profiling experiments clearly show that an interlayer reaction in a Ni/V bilayer forming Ni3V and Ni2V takes place at a temperature around 823 K when it is annealed in vacuum. However, this reaction temperature is reduced down to around 773 K when it is annealed in 0.5 MPa H2. A similar effect has also been observed for a Ni/Nb bilayer previously. These hydrogen-enhanced reactions in the two systems are interpreted to be due to formation of abundant vacancy-hydrogen complexes in the V and Nb layers, which efficiently assist the interdiffusion of the constituent atoms across the interfaces in the two bilayers.

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  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 43 (11), 2692-2695, 2002

    公益社団法人 日本金属学会

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