Al

3

Zr and Al

2

O

3

particles reinforced aluminum matrix composites have been in-situ synthesized through the direct melt reaction using Al-ZrOCl

2

components.The formation of composites has been conducted by the conventional casting method and squeezing casting at 720 ℃.SEM observation shows that the absence of shrinkage porosity and shrinkage hole in the microstructure of squeezed samples with fine grain can be found.Squeezing casting is an interaction process of crystallized solidification and plastic deformation at a high pressure

where expansion energy from applied pressure can increase the nucleation rate

which is beneficial to improving the comprehensive mechanical properties and wear resistance of the composites.