Epoxy Reinforced with Nano-Al2O3 Particles: Mechanical and Tribological Behavior

By introducing Nano size Al2O3 (particle size 100 nm, 0.5-10 wt percent) fillers into an epoxy resin, a systematic study was conducted to investigate matrix properties. To disperse the particles into the resin, a high shear mixing process was used. The experimental results showed that at relatively low concentrations of nano Al2O3, the frictional coefficient and wear rate of epoxy can be reduced. The composites with 1 wt. percent filler have the lowest specific wear rate of 0.7 x 10-4 mm3/Nm, which is 65 percent lower than unfilled epoxy. The addition of Al2O3 particles to epoxy composites improves their mechanical properties. Scanning electron micrographs have been added to the results to help understand the possible wear mechanisms.