Hydrogen-Induced Vacancy Generation Phenomenon in Pure Pd

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  • Sakaki Kouji
    Department of Materials Science and Engineering, Osaka University
  • Yamada Tomoyasu
    Department of Materials Science and Engineering, Osaka University
  • Mizuno Masataka
    Department of Materials Science and Engineering, Osaka University
  • Araki Hideki
    Department of Materials Science and Engineering, Osaka University
  • Shirai Yasuharu
    Department of Materials Science and Engineering, Osaka University

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Description

Lattice defects induced by hydriding in pure Pd have been studied by means of positron lifetime spectroscopy. Component analyses of positron lifetime spectra show that a surprising amount of vacancies together with dislocations are generated by the hydriding at room temperature. Vacancy migration in pure Pd after hydriding is observed around 378 K . Dislocations are much more stable and its migration is observed around 873 K . During the vacancy recovery process, secondary defects, that is, dislocation loops are formed.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 43 (11), 2652-2655, 2002

    The Japan Institute of Metals and Materials

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