铸造GrP?SiCP/ZA27混杂复合材料磨损行为的研究

本文研究了5vo l%G_rP 和10vo l%SiC_P 混合增强ZA 27复合材料滑动磨损行为。分折了在不同载荷(3～ 8kg)、不同滑动速度(0. 1～ 1m/s) 下的磨损机制, 并与SiC_P/ ZA 27复合材料和ZA 27基体合金作对比。试验结果表明: 混杂复合材料的耐磨性优于其它两种材料。这是因为G_rP 的加入提高了材料抗粘着和层离能力; 随着载荷或滑动速度的增大, 材质的磨面形貌和磨层结构发生变化, 由此得出其磨损机制也随之变化。

STUDY ON WEAR BEHAVIOR OF GrP·SiCP/ZA27 CASTING HYBRID COMPOSITE

Wear behavior in hybrid composite of 5vol%GrP·10vol%SiCP/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 SiCP/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 GrP 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.