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利用挤压铸造法制备了Al2 O3 +C/ZL10 9短纤维混杂金属基复合材料 ,并探讨了Al2 O3 纤维体积分数为 12 %时 ,C纤维含量对该混杂复合材料摩擦磨损性能的影响。结果表明 :随着C纤维体积分数的增加 ,复合材料的摩擦因数和磨损率逐渐降低。12 %Al2 O3 和 4%C短纤维的协同作用使复合材料从轻微磨损到急剧磨损的临界转变载荷比基体合金提高了 1倍。当载荷低于临界载荷时 ,复合材料的主要磨损机制为犁沟磨损和层离 ,C纤维的加入有利于磨损表面裂纹尺寸的减小。但随着载荷的逐渐增加并发生严重磨损时 ,基体和复合材料的磨损机制均为严重的粘着磨损甚至局部熔化磨损
Al 2 O 3 + C / ZL10 9 short fiber hybrid metal matrix composites were prepared by squeeze casting. The effects of C fiber content on the friction and wear properties of the hybrid composites were investigated when the volume fraction of Al 2 O 3 fibers was 12%. The results show that the friction coefficient and wear rate of the composites decrease with the increase of the volume fraction of C fibers. The synergistic effect of 12% Al 2 O 3 and 4% C short fibers increased the critical transition load of the composites from slight wear to sharp wear one time more than the matrix alloy. When the load is lower than the critical load, the main wear mechanism of the composites is furrow wear and delamination, and the addition of C fiber is beneficial to the reduction of the size of the crack on the worn surface. However, with the gradual increase in load and the occurrence of severe wear, the wear mechanisms of the matrix and composite materials are serious adhesion wear and even local melting wear