CNTs含量对Al-Zn-Mg-Cu合金的干滑动摩擦磨损的影响  

Effect of CNTs content on dry sliding friction and wear of Al-Zn-Mg-Cu alloy

作　　者：张莉[1] 曾敏[1] 王细洋 武晓峰[2] ZHANG Li;ZENG Min;WANG Xiyang;WU Xiaofeng(School of New Energy Vehicles,Nanchang Institute of Science and Technology,Nanchang 330108,China;School of Materials Science and Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]南昌工学院新能源车辆学院,江西南昌330108 [2]辽宁工业大学材料科学与工程学院,辽宁锦州121001

出　　处：《兵器材料科学与工程》2021年第5期71-76,共6页Ordnance Material Science and Engineering

基　　金：江西省教育厅科学技术重点项目(GJJ181051);江西省教育厅科学技术重点项目(GJJ191094)。

摘　　要：通过液压和热挤压制备CNTs-Al中间纳米材料,用超声振动把中间纳米材料加入熔融铝合金铸造CNTs/Al-ZnMg-Cu铝基复合材料。对CNTs/Al-Zn-Mg-Cu复合材料进行摩擦磨损测试,研究CNTs含量对Al-Zn-Mg-Cu铝合金摩擦磨损性能的影响,探究其与合金显微组织和维氏硬度的关系。结果表明:CNTs的加入明显细化Al-Zn-Mg-Cu合金基体中的α-Al晶粒,显著提高合金的维氏硬度,体积分数为12%的CNTs/Al-Zn-Mg-Cu复合材料组织和性能最佳。在载荷为30 N时,随CNTs含量增加,CNTs/Al-Zn-Mg-Cu复合材料的磨损率和摩擦因数先降低再略微升高,与基体材料相比,体积分数为12%的CNTs/Al-Zn-Mg-Cu复合材料磨损率降低了44.5%,主要磨损机制由基体材料的剥层磨损转变为复合材料的磨粒磨损。CNTs-Al intermediate nanomaterials were prepared by hydraulic and hot extrusion methods,and as-cast CNTs/Al-ZnMg-Cu aluminum matrix composites were prepared via adding the intermediate nanomaterials into the melt Al-Zn-Mg-Cu alloy by means of ultrasonic vibration. The friction and wear behavior of the CNTs/Al-Zn-Mg-Cu composites were tested. The effect of CNTs content on the friction and wear properties of Al-Zn-Mg-Cu aluminum alloy was studied,and the relationship between CNTs and microstructure and Vickers hardness of the alloy was investigated. The results show that the addition of CNTs can refine the α-Al grains and improve the hardness of the alloy significantly. The microstructures and properties of the volume fraction 12% CNTs/Al-Zn-Mg-Cu composites are the best. At a load of 30 N,as the content of CNTs increases,the wear rate and friction coefficient of CNTs/Al-Zn-Mg-Cu composites show a trend of first decreasing and then slightly increasing. Compared with the matrix material,the wear rate of volume fraction 12% CNTs/Al-Zn-Mg-Cu composites reduces by 44.5%,and the main wear mechanism changes from the peeling wear of the matrix material to the abrasive wear of the composite material.

关 键 词：CNTs/Al-Zn-Mg-Cu复合材料 磨损率 摩擦因数 磨损机制 

分 类 号：TB331[一般工业技术—材料科学与工程]