Synthesis of Nanoalumina/Graphene Oxide Hybrid for Improvement Tribological Property of Aluminum

摘要

In this research, an efficient, facile and low-cost chemical method was the developed for preparation of Al(2)O(3/)graphene oxide (GO) hybrid nanoparticle (Al(2)O(3)Nps/GO), through in situ synthesis of Al(2)O(3)Nps in the presence of GO. Al(2)O(3)Nps/GO hybrid nanoparticles added to aluminum powder and nanocomposites were fabricated by powder metallurgy processing and consolidated via the spark plasma sintering. Structure, morphology and composition of the hybrid particle were investigated by means of X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, Raman spectra and thermogravimetric analysis. The results confirmed successful incorporation of alumina over GO surface and formation of pure and homogenized gamma-Al(2)O(3)Nps/GO hybrid particle. Physical and tribological properties of hybrid nanocomposite were investigated by using density, hardness and wear analyses. High relative density was obtained for Al 1 wt% gamma-Al(2)O(3)Nps/GO. Tribological property was studied by pin-on-disk tribometer and showed that the friction coefficient significantly decreased with increasing gamma-Al(2)O(3)Nps/GO content.