Resumen de Electrical conductivity behaviour of ferritic steel interconnect in function of spinel composition, electrode material and thermal cycles
P. Coquoz, Noelia Cotón Sánchez, François Morand, S. Freund, Kelsey J. Ihinger
Conductivity of interconnects has been measured in function ofdifferent parameters. Two ferritic stainless steel grades were used, Crofer 22H and 22APU. Two different spinels composition were deposited, CuMn2O4 and Cu1.35Mn1.65O4. Their thicknesses were varied from 4 to 16 µm to observe the influence on conductivity and its evolution over time. Measurements were donewith direct contact between spinel coatings or by interposing an electrode material. For this purpose, LSC (La0.5Sr0.5CoO3) or LSCF (La0.6Sr0.4Co0.2Fe0.8O3) were directly screen printed on the spinel layer. All these different layers (CuxMnyO4, LSC, LSCF) were deposited on small Crofer coupons (40x20x0.3 mm)and M_grid™. Experiments were performed under oxidizing atmosphere at 800°C under air flow during hundreds of hours. Several thermal cycles were done to assess the stability of the coatings.
