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

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

    Research output: Research - peer-reviewArticle

    • 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.

    LanguageEnglish (US)
    Pages6977-6985
    Number of pages9
    JournalJournal of Materials Science
    Volume48
    Issue number20
    DOIs
    StatePublished - Oct 2013

    Profile

    Gadolinium
    Cerium compounds
    Solid oxide fuel cells (SOFC)
    Indentation
    Porosity
    Hardness
    Gases
    Temperature
    gadolinium oxide
    Chemical sensors
    Separators
    Volume fraction
    Electric properties
    Thermodynamic properties
    Electrolytes
    Membranes
    Mechanical properties
    Electrodes

    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: Research - peer-reviewArticle

    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. 2013 ; Vol. 48, No. 20. pp. 6977-6985
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