The influencing mechanism of modification layer on the performance of SiC3D/Al multi-function gradient composite

SiC skeleton surface was oxidized in this paper. Vacuum-pressure infiltration method is used to prepare SiC3D/Al composite. The effects of the thickness of the interface modification layer were investigated. The results showed that the thickness of SiO2 layer increases with the prolonged time of the skeleton oxidation. The brittle phase basically disappeared at the interface of the composite with 9 hours pre-oxidized, which lead to the high interface bonding strength. As a result, fracture morphology of the oxidized composite is mainly composed with plastic toughening of pure aluminum. Therefore, the static compressive strength of the composite raises up to 1165.2Mpa.