In-situ synthesis of reduced graphene oxide/aluminium oxide nanopowders for reinforcing Ti-6Al-4V composites

Carbon nanomaterials (such as graphene, carbon nanotubes and nano-diamond) are widely used to synthesize metal matrix composites strengthen metals such Ti, Al Cu. However, severe aggregation of these nano-scale reinforcements within the has been a serious issue achieve good performance composites. In this study, we employed an in-situ co-precipitation method decorate reduced graphene oxides with aluminium oxide nanoparticles (i.e. [email protected]2O3), which were then introduced into Ti-6Al-4 V using processes ball milling spark plasma sintering. Effects temperature on characteristics rGONs/Al2O3 nanopowders, their concentrations microstructures mechanical properties systemically investigated. Characterization results revealed that ?-Al2O3 uniformly wrapped rGONs fakes, numbers sizes Al2O3 decreased increase temperature. The protected]2O3 coated onto surfaces powders, thus achieving much finer grain size after sintering process. As content was increased, strength enhanced, whereas elongation slightly decreased. Due effects refinement effective load transfer, composite 0.5 wt% achieved high yield ultimate tensile 950 MPa 1022 MPa, ~120.4% ~117.1% TC4 matrix, respectively. fracture morphology mixture cleavage ductile fracture.