Influence of SiC content on the properties of Al/SiC composites produced by powder metallurgical route

Abstract

In this study, Al/SiC composites were produced by hot pressing and the properties of the fabricated samples were investigated. The composites were produced at 5 wt.%, 10 wt.% and 15 wt.% SiC ratios. The hot pressing process was carried out at 550 degrees C for 30 min with 65 MPa. The properties of the samples were characterized by microstructure analysis, wear and corrosion tests. It was revealed that a higher reinforcement ratio caused the clustering of SiC particles. On the other hand, wear rate and corrosion resistance of the composites were improved with SiC reinforcement. The wear rate of the aluminium was determined as 21.8210-4 mm3Nm-1. The wear rate decreased to 0.6910-4 mm3Nm-1 with 15 wt.% SiC ratio. Moreover, the corrosion rate of the aluminium was reduced from 0.1247 mm/year to 0.0932 mm/year with 15 wt.% SiC. In conclusion, it has been revealed that SiC reinforcement improves the wear and corrosion properties of aluminium.