OS1609 Microstructural Analysis of Sintering Behavior in SOFC Anode using FIB-SEM
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Composite sintering is one of the critical fabrication processes deeply related with an initial performance of solid oxide fuel cells (SOFCs). However, the quantitative understanding of composite sintering is still lacking due to its inherent complexities linking with multiple mechanisms. In this study, the microstructural trajectories of NiO-YSZ during the composite sintering were quantitatively measured utilizing three dimensional reconstruction approach based on focused ion beam-scanning electron microscopy (FIB-SEM) technique. This approach allows us to estimate the change of grain size and tortuosity factor of two phases as a function of relative density. The critical transition of grain growth is observed around the relative density of 0.9, in accordance with the pore network change.
