Electrophoretic co-deposition of Fe2O3 and Mn1, 5Co1, 5O4: Processing and oxidation performance of Fe-doped Mn-Co coatings for solid oxide cell interconnects. Issue 13 (October 2019) - Zanchi, E.
Abstract: Fe-doped Mn1, 5 Co1, 5 O4 coatings on Crofer22APU were processed by an electrophoretic co-deposition method and the corrosion resistance was tested at 750 °C up to 2000 h. The "in-situ" Fe-doping of the manganese cobalt spinel was achieved by electrophoretic co-deposition of Mn1, 5 Co1, 5 O4 and Fe2 O3 powders followed by a two-step reactive sintering treatment. The effects on the coating properties of two different Fe-doping levels (5 and 10 wt.% respectively) and two different temperatures of the reducing treatment (900 and 1000 °C) are discussed. Samples with Fe-doped coatings demonstrated a lower parabolic oxidation rate and thinner oxide scale in comparison with both the undoped Mn1, 5 Co1, 5 O4 spinel coating and bare Crofer 22 APU. The best corrosion protection was achieved with the combined effect of Fe-doping and a higher temperature of the reducing step at 1000 °C.