Iron foams created by directional freeze casting of iron oxide, reduction and sintering

Amelia A. Plunk*, David C. Dunand

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Iron foams with aligned, lamellar channels were created by directionally freeze-casting slurries of water and Fe2O3 nanopowders, sublimating the ice, and reducing and sintering under hydrogen the powders accumulated in the interdendritic spaces. Foam porosity decreases from 85 to 50% with Fe2O3 slurry fractions increasing from 14 to 23 vol.%. For foams created from 18.5 vol.% Fe2O3 slurries, with increasing sintering temperature from 900 to 1100 °C, a decrease in porosity from 71 to 61% and an increase in unidirectional compression strength from 8 to 20 MPa are observed.

Original languageEnglish (US)
Pages (from-to)112-115
Number of pages4
JournalMaterials Letters
Volume191
DOIs
StatePublished - Mar 15 2017

Keywords

  • FeO
  • Freeze-casting
  • Iron
  • Iron oxide
  • Metallic foam

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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