Abstract
To improve the wear resistance of carbon fibers, we optimized the ratio of the plating solution components and developed a new and economical alkaline-based palladium-free method to evenly coat carbon fibers with nickel–phosphorus alloy. The carbon fibers coated with composites deposited using this method demonstrated enhanced frictional properties. Next, the coating thickness was adjusted and tested, and the effects of coating thickness and surface morphology on the frictional properties of carbon fibers were studied to determine the most suitable coating thickness. The friction coefficient and wear rate of the coated composites were analyzed using a friction and wear testing machine under non-lubricated sliding conditions while controlling the friction duration. The surface morphology, elemental composition and oxidation transfer film morphology of carbon fibers with various coating thicknesses were characterized using field-emission scanning electron microscopy and energy-dispersive X-ray photoelectron spectroscopy. The results showed that the oxidation transfer film substantially prevented the internal fibers from participating in the friction process, and the friction coefficient and wear rate decreased as the uniform coverage area of the transfer film increased. The surface wear mechanism of the carbon fibers was analyzed, and abrasive wear was found to be the main wear mechanism. The findings of this study provide a theoretical and experimental reference for reducing the friction and improving the wear resistance of carbon fibers.
Published Version
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