Hydrogen behavior in ultrafine-grained palladium processed by high-pressure torsion

Hideaki Iwaoka, Zenji Horita

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    Hydrogen permeation tests were carried out on ultrafine-grained palladium processed by high-pressure torsion (HPT) and the results were compared with those on an annealed coarse-grained state. It is shown that hydrogen diffusion is similar above 200 C but is enhanced at temperatures below 200 C in the ultrafine-grained state. All samples were subjected to X-ray diffraction analyses after the hydrogen permeation tests. It is shown that hydride formation occurs at lower temperatures in both coarse- and ultrafine-grained states but the hydride formation temperature is reduced to a lower temperature in the ultrafine-grained state. This study suggests that grain boundaries of palladium act as diffusion pass but not as the sites for hydride formation.

    Original languageEnglish
    Pages (from-to)14879-14886
    Number of pages8
    JournalInternational Journal of Hydrogen Energy
    Volume38
    Issue number34
    DOIs
    Publication statusPublished - Nov 13 2013

    All Science Journal Classification (ASJC) codes

    • Renewable Energy, Sustainability and the Environment
    • Fuel Technology
    • Condensed Matter Physics
    • Energy Engineering and Power Technology

    Fingerprint

    Dive into the research topics of 'Hydrogen behavior in ultrafine-grained palladium processed by high-pressure torsion'. Together they form a unique fingerprint.

    Cite this