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Journal of the Electrochemical Society, Vol.164, No.7, D371-D379, 2017
Structure and Properties of Dual Oxide Particles Doped Ni-Fe/In2O3-WO3 Functional Nanocomposite Coatings
In the present study two types of oxide ceramic particles In2O3 (2.0 g/L) and WO3 (4.0 g/L) were reinforced into the Ni-Fe alloy matrix by electro-codeposition for the first time. Despite lower concentration in the bath solution, incorporation of In2O3 particles was higher (up to 5.5 wt%) as compared to the WO3 particles (up to similar to 3.0 wt%). Coatings obtained under optimum condition show permalloy composition (80 wt% Ni-20 wt% Fe) between the range of current density 3.0-5.0 A dm(-2). The coatings were characterized by XRD, FESEM, EDAX, TEM and AFM. The effect of incorporation of these oxide particles and current density on the structure and properties of the nanocomposite coatings was investigated. XRD and TEM studies showed fcc lattice of the matrix with preferred orientation along (111) plane but the relative texture coefficient along (111) plane decreases with increasing current density. Dominance of In2O3 particles on the surface morphology of the coatings was also observed. However, results showed that electrical resistivity, corrosion resistance and microhardness (up to 1025 Hv) of the Ni-Fe/In2O3-WO3 nanocomposite were found between those for the Ni-Fe/In2O3 and Ni-Fe/WO3 nanocomposite coatings. Magnetic studies revealed the soft magnetic nature of the nanocomposite coatings. (C) 2017 The Electrochemical Society. All rights reserved.