Damping and mechanical properties of SiC particles reinforced aluminium matrix composites prepared by colloidal dispersion and suction filtration method

Abstract

In order to uniformly distribute SiC_p in the aluminium matrix and prepare SiC_p/Al composites with high mechanical and damping properties, a preparation method of colloidal dispersion and suction filtration was developed. It was observed from the microstructure of the composites that the SiC_p/Al composites prepared by colloidal dispersion and suction filtration method had good interfacial structures, and the interfacial reaction between SiC_p and aluminium matrix was effectively inhibited. Tensile mechanical properties at room temperature and damping properties in the temperature range of 25 °C to 300 °C were tested for the SiC_p/Al composites with volume fractions of 5% to 10%. The results showed that SiC_p/Al composites have excellent mechanical and damping properties when the volume fraction of SiC_p was 7%. This is because SiC_p were uniformly distributed in the aluminium matrix, and formed a good interfacial bond with the aluminium matrix, which benefitted both the interfacial slip loss and the strengthening effect of SiC_p.