Abstract
This study develops Ni-based metal matrix composite (MMC) coatings on copper substrate with varying Al2O3 concentrations. Adding Al2O3 to Ni-Al2O3 improves its qualities, such as microhardness, friction, wear resistance, corrosion resistance, etc. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) were employed to characterize these MMC’s coatings. In the present work, the microhardness and corrosion resistance of the composite coatings are improved when Al2O3 content is increased to 9%. Secondary particle reinforcement was found to be an influencing factor in microhardness. Further, work is being carried out to study the effect of rising current density and Al2O3 concentration. However, coatings containing 12% Al2O3 nanoparticle agglomeration led to structural weakness, reduced hardness, and poor corrosion resistance. It was determined that an adequate amount of nanoparticles is crucial for enhancing the microhardness and anticorrosion properties of the coatings.
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