Esraa Abdel-Qader; Maryam Abdual-Alazim Baqer
Abstract
This research is devoted to study the effect of different percentage of Graphiteparticles addition (5,10,15) wt% to Brass alloy (α) produced by stir casting using vortextechnique ...
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This research is devoted to study the effect of different percentage of Graphiteparticles addition (5,10,15) wt% to Brass alloy (α) produced by stir casting using vortextechnique , on the wear resistance and the coefficient of friction under dry slidingconditions using pin-on-disk technique . Three loads (5, 10, 15) N were used at differentsliding speeds effect (2.7,3.7,4.7) m/sec . The results showed that the wear rate isincreased in general with increasing the applied load , but the composite materialreinforced with graphite particles showed wear rate lower than that of the base alloy .Thewear 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 .Whenthe coefficients of friction was measured at high loads , It is clear that the compositematerial has low coefficient of friction as compared with that at low loads , while it isdecreased with increasing sliding distance at all used loads , and the composite materialreinforced with graphite particles showed remarkable decreasing in temperature whensurface temperatures were measured as compared with base alloy.
