Effects of SiC particle content on microstructure and properties of lost foam casting SiC particle reinforced aluminum matrix composites were investigated.The result reveal that microstructure of the composites prepared is independent on the SiC particle content and size.In addition

the bonding strength between matrix and the SiC particle is independent of the particle size.With SiC content increase

the bending strength of the composites with the same particle size is decreased

while at the same SiC particle content

with increasing in particle size

the bending strength of the composites exhibits increased firstly and then decreased.The composites with 46 mesh SiC content have the higher bending strength.