Effects of microsize SiC,Al 2 O 3,and ZnO particulates on mechanical and tribological properties of synthesized ortho- and meta-cresol novolac epoxy composites

In this paper, the mechanical and tribological properties of synthesized ortho- and meta-cresol novalac epoxy resin composites have been explored. Three microsize fillers SiC, Al₂O₃, and ZnO particulates (10 wt%) have been used as reinforcement for the composites. The dry sliding wear tests were conducted on the pin-on-disc apparatus at sliding velocities of 0.9 m/s, 1.8 m/s, 2.7 m/s, and 3.6 m/s) and applied normal loads of 10 N, 20 N, 30 N, and 40 N. By evaluating the mechanical and tribological properties, positive synergetic effect was found. It was also found that the coefficient of friction increases and specific wear rate decreases with an increase in the sliding velocity, whereas specific wear rate increases with an increase in the applied normal and decreases with an increase in the sliding velocity. Also, the worn surfaces of novalac epoxy composites were analyzed with the help of scanning electron microscope.