Structure of aluminium matrix composite with ceramic preform obtained by centrifugal infiltration process

The paper presents the microstructure analyzes of composite with aluminium matrix containing porous Al2O3 preform. The AlSi12CuMgNi eutectic alloy have been modified by 1 wt. % Mg and 0.03 wt. % Sr additions. The magnesium have been added to improve the wettability between matrix and ceramic reinforcement have been added. In turn 0.03 wt. % strontium addition was used to change the size and morphology of the Al-Si eutectic grains. The components and composite material obtained by the centrifugal infiltration process was characterized by means of light and scanning microscopy methods. The conducted investigations proved the large degree of infiltration of porous ceramic by the aluminium alloy and good connection in the boundary area.