Investigation on the tribological properties of copper alloy reinforced with Gr/Zro2 particulates by stir casting route

The combination of Graphite (Gr) and Nano Zirconium Oxide (ZrO ) is found efficient in reinforcing
copper matrix composites (CMC) for bearing application due to its intrinsic ultrahigh tribological and
mechanical properties. In this study the wear properties of copper alloy (90% Cu and 10% Sn)
composites were compared with Cu alloy+4wt% Gr, Cu alloy+4 wt. %ZrO and Cu alloy+4wt.
%Gr+4wt% ZrO . In the present investigation the fabrication of CMC composites were made through
stir casting process. The Microstructural characterization was carried with Scanning Electron
microscopy (SEM) and Electron Displacement Spectrum (EDS) to show uniform distribution of
reinforcement particles in the matrix and also to confirm the elements. The wear behavior were
evaluated at varying loads of1, 2 and 3kg with a constant speed of 300rpm and for varying sliding
speeds of 100, 200 and 300rpm and constant load of 3kg using a pin on disc apparatus. After test on
wear machine it was found that Cu alloy with graphite and ZrO2 composites at varying loads and