▎ 摘　　要

In this work, a chemical precipitation procedure for decorating graphene oxide (GO) with Fe2O3 nanoparticles was described. Iron(III) chloride (FeCl3) was employed to generate the nano-Fe2O3 particles onto the GO surface in the presence of sodium hydroxide. The Fe2O3@GO hybrid was characterized by various techniques of X-ray diffraction, Fourier transform infrared spectroscopy, Field-emission scanning electron microscope, Raman spectra, and Atomic-force microscopy. The epoxy (EP)-matrix nanocomposites containing various Fe2O3@GO loadings (0-0.8 wt% at a step of 0.2) were prepared by mechanical stirring and ultrasonic treatment. Mechanical properties of these composites were explored using the three-point bending and dry-sliding wear tests. The results revealed that the best flexural and wear behaviors were related to the specimens containing 0.2 and 0.6 wt% Fe2O3@GO hybrid, respectively. The incorporation of 0.2 wt% Fe2O3@GO was found to increase the flexural strength and modulus by 24% and 29%, respectively. Additionally, mass reduction and friction coefficient were decreased by 97% and 66% respectively, due to the addition of 0.6 wt% Fe2O3@GO. Most importantly, in comparison with the untreated-GO/EP composite, the specimens containing Fe2O3@GO have attained higher improvements in flexural and wear properties. Finally, morphology of the fractured and worn surfaces was also evaluated.