Effect of Perovskite Coating on Oxide Scale Growth on Fe-22Cr
A coating consisting of La0.85Sr0.15MnO3 (LSM) was deposited onto two Fe 22 wt % Cr alloys Crofer 22APU and Sandvik 1C44Mo20. The evolution of the oxide layers developing underneath the coatings during oxidation was investigated. The effect of the LSM coating on oxidation rate and microstructure of the oxide scale was investigated, and possible effects on the overall oxidation mechanism are discussed. It was found that the growth rate for coated Crofer 22APU was decreased by a factor of 3 in comparison with the uncoated samples, and the thickness of the chromia layer in the scales decreased in favor for a (Mn,Cr)-spinel layer.
Andreas Öchsner and José Grácio
Å. Persson et al., "Effect of Perovskite Coating on Oxide Scale Growth on Fe-22Cr", Defect and Diffusion Forum, Vols. 258-260, pp. 372-377, 2006