Submicron SiC particle reinforced Al matrix composites was fabricated by powder metallurgy method.The microstructure of the as-prepared composites was observed by scanning electronic microscopy（SEM）

and the mechanical properties were characterized by tensile testing and Brinell hardness test.The results reveal that with increasing in the volumetric fraction of SiC submicron particles

the relative density of Al-matrix composites is decreased

and hardness and frictional coefficient are increased

while tensile strength and the wear rate of the composites are increased firstly and then decreased.When the volumetric fraction of SiC submicron particles is 6.0%

tensile strength of the composites prepared reaches the maximum value with low wear rate.When SiC submicron particles were added into the aluminum matrix composites

due to its high hardness and strength bearing to certain loading to hinder the sliding of the grain boundaries

mechanical properties and wear resistance of Al matrix composites were improved.