The effect of addition Graphite filler on mechanical properties of epoxy material

Abstract

The current study focuses on the effect of addition graphite filler on mechanical properties of epoxy material. The tensile and bending samples preparation of pure epoxy samples and epoxy with graphite powder with different weight ratio (0.5%, 1%, 1.5%, and 2%wt) using ultrasonic dispersion method. The results showed that the tensile strength and bending resistance were improved at (0.5%, 1%, 1.5%wt) and decreased at (2% wt).The decrease in tensile strength and bending resistance may result from using less sonication time or low ultrasonic energy. The impact test results were also improved with graphite addition and decreased at ratio (2% wt). The decrease in impact test due mechanism of graphite clusters to act as stress concentration sites to produce gaps that absorb some deformation work and prevent development of fissures in the resin matrix. There is an increase in hardness values until 1,5% wt of graphite. In addition of, the distribution of graphite can also affect this result where the penetrant was just on the surface.