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.