Processing and mechanical properties of porous Fe-26Cr-1Mo for solid oxide fuel cell interconnects

J. A. Scott, David C Dunand*

*Corresponding author for this work

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Porous, ferritic steel was produced by blending, pressing and sintering Fe, Cr, Mo and NaCl powders. During sintering NaCl evaporated to form 40-58% interconnected open porosities, while the metal powders densified and interdiffused to create a nearly dense Fe- 26Cr-1Mo matrix (E-Brite, developed for solid oxide fuel cell interconnects). The foam compressive properties at ambient temperature were in good agreement with the Gibson-Ashby scaling laws for stiffness and strength and demonstrate high mechanical energy absorption. The foam compressive creep response at 850 °C under an argon atmosphere followed the same power law stress dependence as the bulk material, suggesting similar deformation mechanisms in each case. Creep data under argon were compared with a variational composite model and a simple unit cell model taking into account thicker nodes connecting slender struts.

Original languageEnglish (US)
Pages (from-to)6125-6133
Number of pages9
JournalActa Materialia
Volume58
Issue number18
DOIs
StatePublished - Jan 1 2010

Keywords

  • Cellular materials
  • Creep
  • Ferritic steels
  • Foams
  • Fuel cell materials

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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