Development of the Ni-based metallic glassy alloys for PEFC separator

Masanori Yokoyama, Shin Ichi Yamaura, Hisamichi Kimura, Akihisa Inoue

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    We prepared the Ni80-xCrxP16B4 (x = 3, 6, 9, 12, 15, 18, 21, 24, 27 and 30 at.%) alloy ingots in an Ar flow atmosphere without evacuation and then produced the alloy ribbons by melt-spinning in evacuation and air. Their thermal stability and other charasteristics were studied and the alloy composition was optimized. A supercooled liquid state appeared at Cr content of more than 9 at.%, and their Tg and Tx increased with increasing Cr content. The Δ Tx increases up to about 45 K with increasing Cr content up to 15 at.%, and then saturates in more higher Cr content. Thus we select the Ni65Cr15P16B4 alloy as an optimized composition for PEFC separator. Moreover, the precise grooves were successfully formed under viscous flow process. The groove-formed sample possessed a single glassy phase, and the Tg, Tx and ΔTx were not changed.lt indicates that the sample was not thermally affected by hot-pressing in this experimental condition.

    Original languageEnglish
    Title of host publicationSelected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
    PublisherTrans Tech Publications Ltd
    Pages1367-1370
    Number of pages4
    EditionPART 2
    ISBN (Print)0878494626, 9780878494620
    DOIs
    Publication statusPublished - 2007 Jan 1
    Event6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6 - Jeju, Korea, Republic of
    Duration: 2007 Nov 52007 Nov 9

    Publication series

    NameMaterials Science Forum
    NumberPART 2
    Volume561-565
    ISSN (Print)0255-5476
    ISSN (Electronic)1662-9752

    Other

    Other6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
    Country/TerritoryKorea, Republic of
    CityJeju
    Period07/11/507/11/9

    Keywords

    • Fuel cell
    • Melt-spinning
    • Ni-based metallic glass
    • Separator
    • Structural material

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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