【摘要】 采用搅拌铸造法制备了Al2O3颗粒增强Al-2%Mn合金基复合材料,对复合材料的显微组织、硬度和摩擦磨损性能进行了研究。结果表明:复合材料组织由Al基体、δ-Al2O3和MnAl6相组成,且Al2O3颗粒在铝基体中弥散分布。与原始铝基体相比,复合材料的布氏硬度提高了约70%。无论是干摩擦还是SO4.Cl-Na.Ca.Mg型弱碱性水溶液润滑摩擦情况下,复合材料的磨损量均显著低于铝基体。与铝锰合金相比,复合材料具有较低的冲刷腐蚀失重速率。复合材料具有优良的耐磨和耐蚀性。更多还原

【Abstract】 Al2O3 particulates reinforced Al-2%Mn alloy matrix composites was fabricated by stirring casting,and microstructure,hardness and friction and wear behavior of the composites were studied.The results show that the as-cast microstructure of the composites is mainly composed of Al,δ-Al2O3 and MnAl6 phase,and the Al2O3 particles are distributed uniformly in Al matrix.Compared with the base metal,hardness of the composites is increased by 70%,and wear loss of the composites are far lower whether under the dry sliding or under the SO4·Cl-Na·Ca·Mg aqeous solution lubricated condition.The erosion-corrosion wear rates of the composites are lower than those of Al-2%Mn alloy irrespective of the rotation speed and the size of grinding particles.The Al2O3 particulates reinforced Al-2%Mn alloy matrix composites exhibit excellent wear-resistance and corrosion-resistance.更多还原