Compressive behavior of SiCp/AlSi9Mg composite foams

Closed-cell AlSi₉Mg foams and SiC_p/AlSi₉Mg composite foams with different SiC_p volume fractions were prepared successfully by means of direct foaming of melt using CaCO₃ blowing agent in this paper. The compressive behaviors of these foams were studied. In comparison with the compressive stress–strain curve of AlSi₉Mg foams that of SiC_p/AlSi₉Mg composite foams is not smooth and exhibits some serrations. At the same relative density of composite foams, the yield stress and collapse stress of the composite foams increase with increasing SiC_p volume fraction. The relationship of yield stress, relative density and SiC_p volume fraction of SiC_p/AlSi₉Mg composite foams with a given particle size was obtained.