Design and competitive growth of different spinels at 750 C for the multi-component CuCoMnFe alloy coatingse

The diversified MnCoCuFe coatings can enhance the thermal growth stability and sintering property of spinel, and the multicomponent spinel exhibits good high temperature conductivity. The oxidation products of seven composite alloy coatings at 750 degrees C, CoNi(Fe), CoMn(Fe), CoMnCu(Fe), MnCu(Fe), MnCuCo(Fe), CuCoMn(Fe) and CuCo(Fe) coatings, were discussed in details. Due to differences in the elements and their concentrations in the designed coatings, some coatings could produce spinel, while others did not. The designed CuCo(Fe) coating and CuCoMn(Fe) coating prepared by electrodeposition in this study with the concentration ratio approximately nCu:nCo:nMn approximate to 1:1:1. The oxidation reaction equations for the CuCoMnFe coating and CuCoFe coating at 750 degrees C were discussed. CoFe2O4 spinel was preferentially formed in the CuCoFe coating and CuMn2O4 spinel was preferentially formed in the CuCoMnFe coating. Both coatings demonstrated the good high-temperature oxidation resistance and high-temperature electrical conductivit