The effect of SiC content on microstructural and tribological properties of sintered B4C and SiC reinforced Al-Cu-Mg-Si matrix hybrid composites
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In this study, B4C and SiC hybrid reinforced Al-Cu-Mg-Si alloy Matrix composites were fabricated using a microwave sintering technique at a sintering temperature of 550 degrees C for 60 min. In the produced hybrid composites, while the B4C ratio was kept constant (3 wt%), SiC was used in four different amounts (3, 6, 9, and 12 wt%). In these produced hybrid composites, as a result of microwave sintering, thanks to the high microwave absorption of SiC, the porosities closed at a rate of 36.65-40.90%. In 3, 6, 9, and 12 wt% SiC reinforced composites, the microhardness of 100.1, 106.8, 114.4, and 117.2 HV0.05 were achieved, respectively. Due to agglomeration increasing with SiC reinforcement rate, delamination wears increased in 12 wt% SiC reinforced hybrid composite. As a result, the lowest specific wear rate was measured as 0.3374 x 10(-3) mm(3)center dot(Nm)(-1) in the 3 wt% B4C+9 wt% SiC reinforced sample.