Research on the friction and wear performance and electrical contact Performance of silver graphite coating

With the rapid development of technologies such as 5G, new energy, and artificial intelligence, higher requirements have been proposed for the power supply stability of high-energy-consuming devices. As a key component in electrical systems, the performance of electrical connectors directly affects the operational efficiency and reliability of devices. This paper investigates the friction and wear properties and contact resistance of silver-graphite coatings, with a focus on exploring the impact of coating thickness and load on their friction and wear characteristics, contact resistance, and other properties. Experimental results show that the silver-graphite coating has a relatively low friction coefficient, averaging approximately 0.2, and the friction coefficient is stable, with a wear rate of only 6 % of that of pure silver coating. In addition, the contact resistance of the silver-graphite coating exhibits good stability under different thicknesses and load conditions, and no significant fluctuations occur within 500 friction and wear cycles. The research results indicate that the silver-graphite coating has excellent wear resistance and electrical contact performance, recommending a coating thickness of 12-15 μm to ensure its reliability and economicality. This study provides experimental data support for the application of silver-graphite coatings in the field of high-current connectors.