SiC颗粒对镁基复合材料摩擦磨损性能的影响  

Effect of SiC Particle Size on Friction and Wear Properties of Magnesium Matrix Composite Material

作　　者：蒋爱云[1] 周亚军[1] 刘建秀[2] 李小辉[2] 訾晓阳[2] 

机构地区：[1]黄河科技学院,河南郑州450005 [2]郑州轻工业学院,河南郑州450002

出　　处：《汽车零部件》2011年第10期50-52,56,共4页Automobile Parts

基　　金：河南省重点攻关资助项目(092102210382)

摘　　要：采用粉末冶金法制备了AZ91镁合金和SiC颗粒增强的镁基复合材料,SiC的粒度分别为18μm和8μm,经热压烧结后制得试样。通过扫描电子显微镜观察分析基体和增强体的微观组织形貌,并将制备出的材料分别放入MMW-1型摩擦磨损试验机上,研究SiC的粒度对镁基复合材料摩擦磨损性能的影响。实验结果表明:SiC颗粒的加入能有效减小β-Mg17Al12网孔的大小;加入两种SiC颗粒的复合材料硬度比基体合金的分别提高6.83%和27.03%;颗粒增强复合材料的摩擦系数相对于镁合金基体有所提高,分别提高2.33%和9.62%。Preparation out AZ91 magnesium alloy and the SiC particles reinforced the magnesium matrix composit by the method of powder metallurgy. The particle size of SiC are 18 μm and 8μm respectively. Hot pressing sintering and make out the sample. Through the scanning electron microscope analysis the microstructure and the morphology of the sample, put the sample in type MMW-1 friction and wear the testing machine respectively, study of SiC size on the magnesium matrix composite friction and wear performance influence. The experimental results show that the SiC particles can effectively reduces the hole size of the β-Mg17Al12 nets; Add two SiC particles of composite materials hardness improved by 6. 83% and 27.03%, respectively; Particles reinforced composite materials of the friction coefficient relative to the magnesium substrate improved by 2. 33% and 9.62%, respectively.

关 键 词：粉末冶金 镁基复合材料 SIC颗粒 

分 类 号：TB331[一般工业技术—材料科学与工程]