Freeze casting of porous Ni-YSZ cermets |
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Authors: | Young-Hag Koh Jong-Jae Sun Hyoun-Ee Kim |
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Affiliation: | School of Materials Science and Engineering, Seoul National University, Seoul, 151-742, Republic of Korea |
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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). |
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Keywords: | Ni-YSZ Cermets Porous Anode Fuel cells |
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