The SiC particle preform was prepared by 3D printing

and the SiC reinforced A356 matrix composites（SiCp/A356composites）were prepared by pressure infiltration technology.The microstructure and phase of SiC

p

/A356 composites were analyzed by optical microscope（OM）

scanning electron microscope（SEM）

energy dispersive spectroscope（EDS）

X-ray diffraction（X-ray）and other modern analysis methods.The results reveal that the microstructure of SiC

p

/A356 composites fabricated by above-mentioned methods exhibits compact with uniformly distributed SiC particles in the A356 matrix and the desirable interface bonding.Moreover

the interfacial reaction is well controlled.As a result

some harmful phases such as Al4C3 brittle phase are absent from interfacial reaction products.Elements Si in the A356 alloy can prevents the formation of Al

4

C

3

brittle phase

and the existence of Mg in the A356 alloy can improve significantly the wettability of SiC with A356.