Site Energy Distributions of Hydrogen Atoms in Ni–Zr Alloy Glasses Studied by Thermal Desorption Spectrometry

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  • Araki Takeshi
    Department of Materials Science and Engineering, Nagoya Institute of Technology
  • Abe Tetsurou
    Department of Materials Science and Engineering, Nagoya Institute of Technology
  • Tanaka Kazuhide
    Department of Materials Science and Engineering, Nagoya Institute of Technology

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  • Site Energy Distributions of Hydrogen Atoms in Ni–Zr Alloy Glasses Studied by Thermal Desorption Spectrometry

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Thermal desorption spectra (TDS) of hydrogen from Ni–Zr alloy glasses are studied experimentally and theoretically. The spectra manifest composite peaks which change systematically with the hydrogen content and alloy composition, Defining a site energy distribution function, N(E), for the dissolved hydrogen atoms and employing a surface recombination model for the desorption kinetics, TDS spectra are calculated and compared with the experiment. The simulated N(E) function has a few Gaussian peaks, and they are attributed to the hydrogen occupancy in quasitetrahedral interstices with different site energies in these glasses.

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