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

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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
Gases
Hardness
Chemical sensors
Separators
Electrolytes
Volume fraction
Electric properties
Thermodynamic properties
Membranes
Mechanical properties
Temperature
Electrodes
gadolinium oxide

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