Al_2O_3颗粒增强Al-Mn合金基复合材料的制备及摩擦学性能  

Fabrication and friction and wear behavior of Al_2O_3 particulates reinforced Al-Mn alloy matrix composites

作　　者：李新梅[1] 刘炳[1] 董晓锋[1] 

机构地区：[1]新疆大学机械工程学院机械工程博士后科研流动站,新疆乌鲁木齐830008

出　　处：《材料热处理学报》2011年第7期6-11,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金资助项目(50861008);新疆高校科研计划基金资助项目(XJEDU2009S03);中国博士后科学基金资助项目(20090451427);中国博士后科学基金特别资助项目(201003708)

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。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.

关 键 词：Al-Mn合金基复合材料 AL2O3颗粒 显微组织 摩擦磨损 冲刷腐蚀 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TB331[金属学及工艺—金属材料]