Abstract
In this study, an Al2O3/MoS2 nanocomposite coating was created on an aluminum 1050 substrate using the plasma electrolytic oxidation method. The zeta potential measurements showed that small MoS2 particles have negative potential and move toward the anode electrode. The nanoparticles of MoS2 were found to have a zeta potential of −25 mV, which prevents suspension in the solution. Thus, to produce an Al2O3/MoS2 nanocomposite, one has to use the microparticles of MoS2. The X-ray diffraction analyses showed that the produced coatings contained α-Al2O3, γ-Al2O3, and MoS2, and that the size of MoS2 particles can be reduced to 30 nm. It was observed that prolonged suspension in the electrolyte results in an enhanced formation of an Al2O3/MoS2 nanocomposite. Using the results, it was hypothesized that the mechanism of the formation of the Al2O3/MoS2 nanocomposite coating on the aluminum 1050 substrate is based on electrical energy discharge.
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