Efficiencies of cobalt- and copper-based coatings applied by different deposition processes for applications in intermediate-temperature solid oxide fuel cells

Solid Oxide Fuel Cells (SOFCs) are electrochemical conversion devices that produce electricity directly by oxidising a fuel. The interconnects between the individual cells need to be coated limit Cr(VI) evaporation from steel and preserve electrical conductivity. Physical Vapour Deposition (PVD)-coated samples with Ce/Co, Ce/Cu, Ce/MnCu, Thermal Spray (TS)-coated Mn/Co, Cu Mn/Cu AISI 441 were exposed at 650 °C for up 1000 h. PVD Ce/Co Ce/Cu coatings, as well TS Mn/Co coating, exhibited formation of thin protective Cr 2 O 3 scales underneath coating. These also lowest area-specific resistance (ASR) values. remainder much higher mass gains ASR measurements showed all coatings behaved approximately same despite being only about one-tenth thickness coatings. • < 1 ?m efficient 10 thermal spray mitigating evaporation. forms conductive CuO top layer intermediate spinel. coating equally good °C.