Abstract
Porous gadolina-doped ceria (Ce0.9Gd0.1O1.95, 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.
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Authors Qing Yang and Jason D. Nicholas acknowledge the support of a Michigan State University Faculty Startup Package.
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Fan, X., Case, E.D., Yang, Q. et al. Room temperature hardness of gadolinia-doped ceria as a function of porosity. J Mater Sci 48, 6977–6985 (2013). https://doi.org/10.1007/s10853-013-7506-3
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DOI: https://doi.org/10.1007/s10853-013-7506-3