Room temperature hardness of gadolinia-doped ceria as a function of porosity

Xiaofeng Fan, Eldon D. Case, Qing Yang, Jason D. Nicholas

    Research output: Contribution to journalArticle

    • 3 Citations

    Abstract

    Porous gadolina-doped ceria (Ce0.9Gd0.1O 1.95, GDC10) is commonly used as a functional electrode support in solid oxide fuel cells, gas sensors, and gas separators. In addition, dense GDC10 is commonly used as a solid oxide fuel cell electrolyte and a gas separation membrane. Although, porosity affects a wide range of electrical, thermal, and mechanical properties of solids, this study focuses on (i) the Vickers indentation hardness, H, as a function of volume fraction porosity, P, ranging from 0.08 to 0.60 and (ii) the load dependence of H for Vickers indentation loads of 0.98-9.8 N. For the 13 GDC10 included in this study, the decrease in H with increasing P is approximated by the empirical relationship H = H 0 exp(-b H P), where H 0 = 5.844 GPa and b H = 6.68. In addition, the H values were roughly independent of the applied load.

    Original languageEnglish (US)
    Pages (from-to)6977-6985
    Number of pages9
    JournalJournal of Materials Science
    Volume48
    Issue number20
    DOIs
    StatePublished - Oct 2013

    Profile

    Porosity
    Cerium compounds
    Solid oxide fuel cells (SOFC)
    Indentation
    Hardness
    Gases
    Accounts Payable and Receivable
    Epichlorohydrin
    Cyclic P-Oxides
    Gadolinium
    Chemical sensors
    Separators
    Volume fraction
    Electric properties
    Thermodynamic properties
    Electrolytes
    Membranes
    Mechanical properties
    Electrodes
    Temperature

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

    Cite this

    Room temperature hardness of gadolinia-doped ceria as a function of porosity. / Fan, Xiaofeng; Case, Eldon D.; Yang, Qing; Nicholas, Jason D.

    In: Journal of Materials Science, Vol. 48, No. 20, 10.2013, p. 6977-6985.

    Research output: Contribution to journalArticle

    Fan, Xiaofeng; Case, Eldon D.; Yang, Qing; Nicholas, Jason D. / Room temperature hardness of gadolinia-doped ceria as a function of porosity.

    In: Journal of Materials Science, Vol. 48, No. 20, 10.2013, p. 6977-6985.

    Research output: Contribution to journalArticle

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