SiCp particle reinforced aluminum matrix composites pistons have been successfully prepared by centrifugal casting at rotating velocity of 800 r/min combining with stirring method

in which slurry temperature was set at 850

850

800

800℃ corresponding to mould temperature at 600

500

600

500 ℃

respectively.Effects of slurry temperature and mould temperature on segregation of SiC particles in the aluminum matrix alloy were investigated.The results reveal that with increasing in slurry temperature and mould temperature

segregation of SiC particle becomes more and more obvious.In addition

hardness and wear resistance of the prepared piston at four kinds of processing parameters were examined.It is found that hardness of the SiC particle segregated zone is superior to that of the matrix zone

greatly improving wear resistance of the composites piston.