Microstructure mechanical behavior of Cu-Sn alloy reinforced with Al2o3 and Graphene metal matrix composite

Abstract

In the present study, an effort has been made to examine the Microstructure and Wear characteristics of composites manufactured from Cu + 10 wt% Sn alloy as matrix and reinforced with Graphene Oxide (GO) and Alumina. Cu + 10 wt% Sn alloy hybrid composites is prepared reinforced with alumina (10 vol%) and altering weight percentage of Graphene oxide (0.25 wt%, 0.5 wt% and 1 wt%) by spark plasma sintering technique. Wear characteristics of developed composites is studied using Pin on Disc Wear Testing machine. Utilizing optical microscopy the microstructural investigation is conducted. The results revealed that (Cu + 10 wt% Sn alloy-10 vol% Al2O3-0.25 wt% GO) and (Cu + 10 wt% Sn alloy-10 vol% Al2O3 − 0.5% wt%) of hybrid nanocomposite showed an increase of 25 % in the hardness, a reduction of 25% in the wear rate for Cu + 10 wt% Sn alloy-10 vol% Al2O3-0.25 wt% GO and Cu + 10 wt% Sn alloy-10 vol% Al2O3 − 0.5% wt% GO of hybrid nanocomposite, and an increase trend wear rate is observed with increase in applied load and disc speed in dry pin on disc wear testing. The result also revealed the uniform reinforcement distribution in microstructure and more than 95 % densification of all composites with spark plasma sintering process.