Authors

10.30684/etj.27.6.20

Abstract

This research is devoted to study the effect of different percentage of Graphite
particles addition (5,10,15) wt% to Brass alloy (α) produced by stir casting using vortex
technique , on the wear resistance and the coefficient of friction under dry sliding
conditions using pin-on-disk technique . Three loads (5, 10, 15) N were used at different
sliding speeds effect (2.7,3.7,4.7) m/sec . The results showed that the wear rate is
increased in general with increasing the applied load , but the composite material
reinforced with graphite particles showed wear rate lower than that of the base alloy .The
wear resistance of the composite material reinforced with graphite particles with 15 wt%
was higher than that of reinforced with 5 wt% . When different sliding speeds were used
, the results showed that , the wear rate is decreased with increasing sliding speed .When
the coefficients of friction was measured at high loads , It is clear that the composite
material has low coefficient of friction as compared with that at low loads , while it is
decreased with increasing sliding distance at all used loads , and the composite material
reinforced with graphite particles showed remarkable decreasing in temperature when
surface temperatures were measured as compared with base alloy.