STUDY ON WEAR BEHAVIOR OF G_rP·SiC_P/ZA27 CASTING HYBRID COMPOSITE

Wear behavior in hybrid composite of 5vol%G_rP·10vol%SiC_P/ZA27 alloy has been investigated. The wear mechanisms of the hybrid composite under different loads and sliding velocities are mainly discussed and compared with those of SiC_P/ZA27 composite and ZA27 alloy. The results indicate that wear resistance of the hybrid composite is better than that of the other two materials. This is because the addition of G_rP increases the ability of seizure resistance and delamination resistance. The different changes of worn surface morphologies and worn damaged layers of different materials take place with the increase of loads and sliding velocities, and therefore their transition experiences of wear mechanisms are also different.