Effect of Sintering Temperature on the Microstructure and Mechanical Properties of Solid Oxide Fuel Cell Anode Fabricated by Spark Plasma Sintering

Microstructural and mechanical properties of Ni-YSZ fabricated using SPS processing have been investigated at various sintering temperatures. Our study shows samples to be applied as a SOFC anode have the proper porosity of 40% and high hardness when processed at $1100^{\circ}C$. These results are comparable to the values obtained at $100-200^{\circ}C$ higher sintering temperature reported by others. This result is important because when the fabrication processes are performed above $1100^{\circ}C$, the mechanical property starts to decrease drastically. This is caused by the fast grain coarsening at the higher temperature, which initiates a mismatch between thermal expansion coefficients of Ni and YSZ and induces cracks as well.

플라즈마 소결법을 이용한 고체산화물 연료전지 음극 제조 시 소결온도에 따른 미세구조 및 물성평가