Scanning Electron Microscopy Study for Fracture Surface of Epoxy/Al2O3 Nanocomposites [ ]

The effect of Al2O3 nanoparticles 50 nm on some mechanical properties of epoxy resin was investigated (Young’s modulus and Flexural strength). Moreover, this study shows the effect of using scanning electron microscopy on fracture surface. The nanocomposites were prepared by using three processing steps with different fraction volume of nanoparticles (1, 2, 3, 4, 5, 7 and 10 %). Flexural strength and Young’s modulus of nanocomposites were increased at low fraction volume (Max. enhancement at 3%). However, at higher fraction volume, both Young’s modulus and Flexural strength were decreased with increasing of ductility, and the mechanical properties were enhanced more than that of neat epoxy resin. Fracture surface topography shows rougher and lesser uniform surface compared with that neat epoxy resin, more than one crack propagation directions as well as river lines are lesser in length and crowded compared with neat epoxy resin. The current study shows that Al2O3 nanoparticles agglomerations are very obvious in the fracture surface.