بررسی خواص تریبولوژیکی پوشش کامپوزیتی نیکل- کاربید سیلیسیم با افزایش دمای سایش

In this research, the ni-sic composite coating, which is mostly used for coating the inner walls of engine cylinders, was carried out by electro-co-deposition from a sulfamate bath. both of mechanical and ultrasonic stirrers were used simultaneously during the process. the wear tests were carried out from 25 ?c to 300 ?c by pin-on-disk method and the room and high temperature tribological behaviors of the coating were investigated. the results showed that at the 200 ?c and 300 ?c which is nearly the working temperature of the cylinders, wear resistance of coating greatly decreases. at room and 100 °c temperatures, the detachment of particles from the surface and the weight loss values were very low, but at higher test temperatures, the wear resistance highly decreased. on the other hand, increase in wear test temperature caused to increase the friction coefficient to about 0.42, 0.65 and 0.60 at 100 °c, 200 °c and 300 °c rather than about 0.36 at 25 °c, respectively.