Tribological properties of Ni-W-TiO2-GO composites produced by ultrasonically-assisted pulse electro co-deposition

The Ni-W-TiO2-Graphene oxide co-deposition with excellent mechanical properties, high wear resistance was produced using ultrasonic-assisted pulse electrodeposition. In the present study, the effects of concentration of graphene oxide and TiO2 particle on the morphology, microstrain, crystallite size, hardness, elastic modulus, and tribological properties of the Ni-W co-deposition were studied. The morphology, microstructure, and phase analysis of the coatings were investigated using X-ray diffractometer (XRD) and Field Emission Scanning Electron Microscopy (FESEM). X-ray diffraction (XRD) analyses showed that the crystallite size of the Ni(W) matrix decreased with incorporated graphene oxide and TiO2 particles while increased microstrain. Raman analysis is used to confirm the existence of graphene oxide and ceramic particles in the Ni(W) matrix. FESEM results indicated that the Ni-W-TiO2-Graphene oxide co-deposition displayed a compact surface structure, while the crystallite size and microstrain of the composite coating were 7 nm and 3.5 x 10(-3), respectively. Nano-mechanical test results showed a maximum of 8.1 GPa and similar to 209 GPa increases in hardness and elastic modulus with adding graphene oxide and TiO2, respectively. Incorporation of graphene oxide and TiO2 particles into the matrix, the wear rate of the resulting coating can be increased significantly. The tribological behavior of the Ni-W-GO composite coating deposited various graphene oxide concentrations and Ni W, Ni-W-TiO2, the Ni-W-TiO2-Graphene oxide coating was compared, and their different wear mechanisms have been discussed. Detailed studies of the worn surface were performed with SEM, EDS, and Raman.

Automated summary

In this study, the Ni-W-TiO2-Graphene oxide co-deposition was prepared using ultrasonic-assisted pulse electrodeposition, and the effects of graphene oxide and TiO2 particles on the properties of the coating were investigated. The addition of graphene oxide and TiO2 led to increased hardness and elastic modulus, but also increased the wear rate of the resulting coating. Detailed analyses of the coatings' morphology, microstructure, and tribological behavior were conducted to understand the impact of incorporating these particles into the matrix.