Microstructural and Electrical Characterization of Plasma Sprayed Cu-Mn Oxide Spinels as Coating on Metallic Interconnects for Stacking Solid Oxide Fuel Cells†

摘要: Interconnect coatings are extremely important to ensure an optimal performance of a solid oxide fuel cell (SOFC) stack. Nowadays the most common material used produce SOFC interconnects is ferritic stainless steel (FSS) rich in chromium which much less expensive than previously ceramic interconnects. Nevertheless have be coated order provide protection from aggressive environment that surrounds them and reduce species migration cell's cathode. In this work three different were applied Crofer® 22 H substrates via atmospheric plasma spraying (APS): two stoichiometries copper manganese (CuxMn3–xO4, where x = 1.4 1.5) one cobalt (CoxMn3–xO4, x = 1.5), considered state art coating for X-ray diffraction (XRD) was check composition deposited layers. Area specific resistance (ASR) samples has been characterized range 673–1,073 K during 100 hours ageing test at 1,073 K. Microstructural changes Cr-barrier properties by SEM-EDX analyses.