增强颗粒对铝基复合材料摩擦学性能的影响

采用自制的摩擦磨损试验机考察了增强颗粒对铝基复合材料摩擦磨损性能的影响。结果表明：在基体合金、陶瓷颗粒尺寸和体积分数相同的条件下，SiC增强铝基复合材料的摩擦磨损性能优于Al2O3增强铝基复合材料；增大颗粒尺寸或增加颗粒体积分数均使得SiC颗粒增强铝基复合材料的平均摩擦系数略有降低，耐磨性能提高；在与半金属摩擦材料配副时，颗粒增强铝基复合材料的摩擦系数与基体合金的相近，耐磨性能提高了3个数量级。

The Tribological Behavior of Aluminum-matrix Composites Reinforced with Ceramic Particulates in Dry Sliding against a Semi metallic Frictional Material

The tribological behavior of Al alloy matrix composites reinforced with ceramic particulates (SiC p and Al 2O 3) in dry sliding against a semi metallic frictional material was investigated with a disk on block friction and wear tester. The worn surface morphologies of the composites and the counterpart semi metallic frictional material were observed with a scanning electron microscope. It has been found that the composites reinforced with SiC p are superior to the composites reinforced with Al 2O 3 in terms of the tribological behavior. The The composites reinforced with SiC p particulates of larger size and/or volume fraction show greatly increased wear resistance and slightly decreased friction coefficient. The particulate reinforced Al alloy matrix composites have wear rates as lowas 0.1% of the matrix alloy, which corresponds to largely decreased of the wear rate of the counterpart frictional material as well.