Al-20Si alloy was remelted at different temperatures

and then was mixed with Zn melt by means of electrolyte copper to fabricate silicon particle reinforced zinc matrix composites. The microstructure and mechanical properties of the composites were investigated by SEM （scanning electron microscope）

XRD （X-ray diffraction） and tensile testing. The results indicate that fine silicon particles distributed homogeneously in the ZA27 alloy can be obtained by adjusting the technical design. Hardness and tensile strength of the prepared composites are greatly superior to those of ZA27 matrix alloy

while elongation is distinctly lower than that of the ZA27 alloy.