Structural changes of Ni/YSZ cermet for solid oxide fuel cells in hydrocarbon gas containing atmospheres

Takashi Nakamura, Nobuyuki Ohmura, Keiji Yahiro, Koji Amezawa

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    Macroscopic and microscopic structural changes of Ni/YSZ cermets in CH4, C2H6, and C3H8 containing atmosphere at 1073 K were evaluated by dilatometry and SEM observation. Carbon deposition was observed in low-humidified hydrocarbon atmospheres, accompanying significant expansion of the cermet. SEM observation of the cross section revealed that carbon deposition took place preferentially near the surface and Ni particles seemed to be surrounded by the deposited carbon. The expansion due to carbon deposition did not depend on the kind of hydrocarbon but on the amount of supplied carbon. On the other hand, in high-humidified hydrocarbon atmospheres, e.g. S/C ≥ 1, no carbon deposition and expansion were observed.

    Original languageEnglish
    Pages (from-to)1539-1544
    Number of pages6
    JournalECS Transactions
    Volume57
    Issue number1
    DOIs
    Publication statusPublished - 2013 Jan 1

    ASJC Scopus subject areas

    • Engineering(all)

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