MARIAN BASTIUREA, DUMITRU DIMA, ANTON HADAR, GABRIEL ANDREI FRICTION AND WEAR BEHAVIOUR OF POLYESTER NANOCOMPOSITES WITH GRAPHENE OXIDE AND GRAPHITE INVESTIGATED THROUGH BLOCK-ON-RING TEST A new class of polyester nanocomposites with graphene oxide and graphite has been obtained through a specific chemical method. Aiming to assess the tribological performance of this type of material, a basic experimental plan has been conceived which includes block-on-ring test, wear rate measurement, Vickers micro hardness test and scanning electron microscopy. Accordingly, the influence of graphene oxide and graphite on coefficient of friction and friction stability were investigated through wear test of nanocomposite blocks against steel rings. At the same time, specific wear rate was inferred in order to examine the mass loss which is strongly dependent on surface micro hardness. After wear test, SEM analysis allowed identification of the transfer film between nanocomposite surface and steel counterpart, and the occurrence of the third body. A careful examination of the friction coefficient recordings has highlighted the effect of the contact condition during the dry sliding test.
Keywords: graphene oxide, graphite, polyester nanocomposite, wear, friction, transfer film