Friction and Wear Behavior of Metal Matrix-Graphite Fiber Composites,

摘要

The wear and friction properties of metal matrix-graphite fiber composites produced through the process of liquid-metal infiltration were determined in the unlubricated condition at room temperature. Stationary slider specimens were pressed against rotating steel rings at loads between 3 and 30 N and at a sliding speed of 0.684 m/sec. The materials examined include a variety of matrix materials (several aluminum alloys, copper, and tin) infiltrated into a variety of continuous graphite fibers (rayon and polyacrylonitrile precursor fibers). The results indicate that the type of fiber significantly influences the tribological behavior of the aluminum alloy matrix composites. No significant effect of fiber orientation with respect to the wear and friction properties was observed. Except for the aluminum alloy-rayon precursor fiber composite, the wear rates and friction of the metal matrix-graphite fiber composites are superior to those of the unreinforced matrix material.