Freeze casting of porous Ni-YSZ cermets

Young-Hag Koh, Jong J. Sun, Hyoun E. Kim

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Dual-phase porous Ni-YSZ cermets were fabricated via the freeze casting of a ceramic/camphene slurry. After removing the frozen camphene via sublimation at room temperature, the green samples were sintered for 3 h in air at various temperatures, ranging from 1100 to 1350 °C, and then reduced in an Ar-5% H2 atmosphere at 700 °C for 3 h. The fabricated Ni-YSZ cermets showed 3-D pore channels formed by the replication of the entangled camphene dendrite network and small pores in the Ni-YSZ walls produced by partial sintering of the NiO-YSZ composite. Furthermore, the fabricated samples were found to possess reasonable electrical conductivities, thus rendering them suitable for use as the basic components of planar solid oxide fuel cells (SOFCs).

Original languageEnglish
Pages (from-to)1283-1287
Number of pages5
JournalMaterials Letters
Volume61
Issue number6
DOIs
Publication statusPublished - 2007 Mar 1
Externally publishedYes

Fingerprint

Camphene
cermets
Cermets
yttria-stabilized zirconia
Casting
Sublimation
Solid oxide fuel cells (SOFC)
porosity
dendrites
Sintering
solid oxide fuel cells
sublimation
Temperature
sintering
Composite materials
ceramics
Air
atmospheres
electrical resistivity
composite materials

Keywords

  • Anode
  • Cermets
  • Fuel cells
  • Ni-YSZ
  • Porous

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Freeze casting of porous Ni-YSZ cermets. / Koh, Young-Hag; Sun, Jong J.; Kim, Hyoun E.

In: Materials Letters, Vol. 61, No. 6, 01.03.2007, p. 1283-1287.

Research output: Contribution to journalArticle

Koh, Young-Hag ; Sun, Jong J. ; Kim, Hyoun E. / Freeze casting of porous Ni-YSZ cermets. In: Materials Letters. 2007 ; Vol. 61, No. 6. pp. 1283-1287.
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