Abstract:

Cerium oxide (CeO2) particle reinforced Ni-B composite coating was produced by electroless coating method from a Ni-B coating bath containing CeO2 particles. In the electroless plating bath, nickel sulfate hexahydrate ((NiSO4.6H2O) was used as nickel source, dimethylamine borane ((CH3)2NHBH3) as reducing agent, thiourea (CH4N2S) as stabilizer and sodium acetate (CH3COONa) as complexing agent. The aim of the study is to investigate the structural characterization of CeO2 particle reinforced coating and the effects of wear test conditions on its tribological properties. The surface morphology of the coating was performed by scanning electron microscope (SEM), and phase structure analysis was performed by X-ray diffraction (XRD). Nanohardness measurements were carried out with a nanoindenter device, and wear tests were done with a ball-on-disk test device. Worn surface analyzes were made using a 3D profilometer. Experimental results showed that the hardness of the coating increased with heat treatment; however, its tribological behavior changed depending on different loads

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