The evolution of microstructure and electrical performance in doped Mn-Co and Cu-Mn oxide layers with the extended oxidation time

P.Y Guo,H Sun,Y Shao,J.T Ding,J.C Li,M.R Huang,S.Y Mao,Y.X Wang,J.F Zhang,R.C Long,X.H Hou

doi:10.1016/j.corsci.2020.108738

The evolution of microstructure and electrical performance in doped Mn-Co and Cu-Mn oxide layers with the extended oxidation time

P.Y Guo, H Sun + Show 9 more

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https://doi.org/10.1016/j.corsci.2020.108738

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Journal: Corrosion Science	Publication Date: May 19, 2020
Citations: 26	License type: cc-by-nc-nd

Affiliation: Jiangsu University of Science and Technology, Suzhou Vocational University, Yanshan University, University of Nottingham

#Initial Stage Of Oxidation #Area-specific Resistance Values + Show 8 more

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Abstract

Mn-Co and Cu-Mn based alloy coatings are deposited on 430 SS by high energy micro-arc alloying process, and then alloy coatings are oxidized at 750 °C in air to form the spinel oxides. Some composite oxides, such as Co3O4, Mn2O3 and (Mn,Co)3O4, are formed at the initial stage of oxidation. The single-phase spinel (pure MnCo2O4) without impurity phases is only found on the surface of Co-33Mn-17Cu oxide layer with the extended oxidation time, its area-specific resistance values at 500 °C to 800 °C are low and close to that of Mn-35Cu oxide layer which mainly composed of Cu1.2Mn1.8O4 spinel.

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