Abstract
Improving the anti-friction behaviors of silicon-based coatings is of great significance for the lifetime and reliability of the devices. In this work, tungsten disulfide/ graphene oxide (WS2/GO) nanocomposites with different relative contents of GO were firstly prepared by the hydrothermal method. Then 3-(aminopropyl)triethoxysilane (APTES) was employed to establish Si-O-Si links and CNC bonds, enabling WS2/GO films to be assembled on hydroxylated amorphous silicon (a-Si) coatings. Finally, the tribological properties of a-Si assembled with WS2/GO membranes against alumina ceramic (Al2O3) spheres in ambient air were systematically investigated. Through the analysis of the morphology and composition of the friction marks, the reason for the low coefficient of friction (0.12) is the formation of a robust and stabilized WS2/GO membrane at the friction interface, and the lubrication mechanism is attributed to the fact that WS2 nano-sheets extends the layer spacing of GO and promotes the interlayer slip of GO.
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