纳米SiC颗粒强化AA6061的磨粒磨损行为  

The Abrasive Wear Properties of Aluminum Alloy 6061 Reinforced with Nano-SiC Particles

作　　者：李晓丹[1] 翟玉春[1] 马军平[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2011年第11期1583-1586,共4页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展计划项目(2005CB623707)

摘　　要：实验制备了纳米SiC颗粒强化AA6061基材料,并考察了其微观组织、硬度及磨损性能.结果表明:在20 N载荷下,强化试样的磨损率及摩擦系数均低于AA6061基体,其中0.6%SiC/AA6061复合材料的磨损率较基体降低50%.这主要是由于SiC颗粒自身良好的载荷承载能力,加之增强颗粒/基体间界面良好的结合,使SiC颗粒的添加提高了复合材料的磨损抗力.同时,促进了富铁机械转移层的形成,降低了摩擦系数和磨损率.AA6061基体和强化材料在20 N载荷下的磨损机制均为磨粒磨损.Aluminium alloy 6061（AA6061） matrix composites reinforced with nano-SiC particles were produced.The microstructure,Vickers microhardness and characteristic wear properties of the composites were investigated.The results showed that the wear rate and the friction coefficient values of the composites are lower than the matrix alloy at 20 N load,the wear rate of 0.6%SiC/AA6061 decreases 50% than the matrix.This is attributed to the strong bonding between the matrix and the particles in the composites.So the presence of SiC particles in the composites improves the wear resistance because these particles remain intact and retain their load-bearing capacity,they promote the formation of iron-rich transfer layer.The dominant wear mechanisms are found to be abrasion for the AA6061 alloy and its composites at 20 N load.

关 键 词：干滑动磨损 AA6061 纳米SiC强化 磨粒磨损 

分 类 号：TB333[一般工业技术—材料科学与工程]