Wear behavior of graphite/e-glass fiber/mica reinforcedAl7075 based hybrid MMCs

Present work focuses on synthesis and wear characterization of Al7075 based hybrid composite reinforced with the mica, E-glass fibers and graphite particles. The hybrid composites with various content of reinforcements have been fabricated through liquid metallurgy method. Microstructural studies, hardness test and wear test were conducted on hybrid composites. Wear behaviour was evaluated by subjecting hybrid composites to pin on disc test according to ASTM G-99 procedure at different sliding speed. Homogeneous dispersion and minimal clustering of graphite, E-glass fibers and mica were observed in optical micrographs. Hybrid composites with higher hardness confirmed lower wear loss for all cases of sliding speed. Worn-out surfaces were analyzed using scanning electron micrographs to recognize wear mechanisms.