纳米铜粉粒径对NAO型摩擦材料摩擦磨损性能的影响  

Effect of Copper Particle Size on Friction and Wear Performance of NAO Friction Material

作　　者：陈健[1] 周柯[1] 穆立文[1] 史以俊[2] 王昌松[1,3] 冯新[1] 

机构地区：[1]南京工业大学材料化学国家重点实验室,江苏南京210009 [2]南京林业大学理学院,江苏南京210037 [3]常熟钰泰隆摩擦新材料科技有限公司,江苏常熟215500

出　　处：《非金属矿》2012年第4期76-78,共3页Non-Metallic Mines

基　　金：国家自然科学基金青年基金项目(51005123);江苏省应用化学与材料领域研究生创新与学术交流中心开放基金项目(2010ACMC05);常熟市领军型创新创业人才计划(CSRC1132)

摘　　要：考察了纳米铜粉粒径、含量对酚醛树脂基摩擦材料摩擦磨损性能的影响,采用扫描电子显微镜分析磨损面形貌,并探讨其磨损机制。结果表明:与传统微米铜粉相比,纳米铜粉可使材料摩擦因数的稳定性提高一倍。随着铜粉尺寸的减小,摩擦材料的摩擦因数稳定性提高,磨损率也逐渐变小。添加2%铜粉(50 nm)的摩擦材料摩擦因数最稳定且具有较低的磨损率。在高温段(350℃),添加50 nm铜粉的材料磨损率仅为0.199×10-7cm3/(N.m),是添加微米铜粉的70%。SEM分析显示纳米铜粉使摩擦表面更平稳,添加了纳米铜粉的摩擦材料具有更稳定的摩擦因数及较低的磨损率。The friction and wear properties of braking friction materials filled with different content and size of nano-Cu were studied, the worn surface was investigated by SEM, the abrasion mechanism was discussed. The results revealed that nano-Cu could significantly improve the stability of the friction performance. The friction stability of the materials filled with nano-Cu is much better than the materials filled with macro-Cu. With the decreasing of diameter of the copper, friction stability of the materials became much smoother and the wear resistance became better. At the elevated temperature （350 ℃）, the wear rate of the material filled with nano-Cu（50 nm） was just 0.199× 10^-7 cm^3/（N· m）, which was just about 70% of the material filled with macro-Cu. The addition of 2% nano-Cu （50 nm） could improve the wear resistance best. SEM study showed that nano-Cu was helpful to form smooth friction surface.

关 键 词：纳米铜粉 摩擦材料 刹车片 摩擦磨损 

分 类 号：TH117.1[机械工程—机械设计及理论]