Wear and corrosion behaviors of SiC-subP reinforced copper matrix composite formed by hot pressing

摘要

Wear and corrosion behaviors of SiCp reinforcedcopper matrix composite formed by not pressing were studied.The results show that the tensile strength, hardness and materialporosity increased with the increase of SiCp content. The wearrate of CuSiCp composites decreased with the increase of SiCpcontent, applied load and high sliding velocity (exceeds300rpm). In contrast the wear rate or Cu/Sic compositesincreased with low sliding velocity (100 rpm to 300). Adramatic wear rate of Cu/SiC composite is observed at the initialwear stage(0-400m). However, when sliding distance exceeds8000m/. The dwear behavior becomes more stable, in addition,the corrosion resistance of Cu/SiC composite in 5% NaClsolution increases with increasing pH value, but decreases withincreasing SiC content. Pits always initiate at the interfacialboundary between SiC and copper, which makes SiC particlespeeling and copper matrix pitting deeply.