碳纳米管改性镀铜石墨/铜复合材料摩擦磨损性能的研究  

Tribological Properties of Copper-coated Graphite/Copper Composites Modified by Carbon Nanotubes

作　　者：冯志荣[1] 易茂中[1] 陈伸干 朱林英 Feng Zhirong;Yi Maozhong;Chen Shengan;Zhu Linying(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《广东化工》2022年第18期1-4,共4页Guangdong Chemical Industry

摘　　要：采用放电等离子烧结(SPS)工艺制备碳纳米管(CNTs)含量为0~0.3 wt%的碳纳米管-镀铜石墨/铜(CNTs-CCG/Cu)复合材料,研究了CNTs含量对复合材料物理、力学和摩擦磨损性能的影响。实验结果表明:随着CNTs含量从0增加至0.3 wt%,复合材料电阻增加,抗弯强度先升高后降低,在其添加量为0.1 wt%时达到最大值124.5 MPa。摩擦系数和磨损率先降低后升高,在CNTs添加量为0.1 wt%时最低,分别为0.15左右和9.63×10m^(3)N^(-1)m^(-1)。摩擦过程中适量的CNTs协同CCG在材料表面形成高强度连续摩擦膜,有效降低了复合材料的摩擦系数和磨损率。Carbon nanotubes(CNTs)-copper-coated graphite/copper(CNTs-CCG/Cu)composites with 0~0.3 wt%CNTs content were prepared by spark plasma sintering(SPS)process.The effects of CNTs content on the physical,mechanical and tribological properties of the composites were studied.The results show that with the increase of CNTs contents from 0 to 0.3 wt%,the resistance of the composites increased,and the bending strength increased first and then decreased,and reached the maximum value of 124.5 MPa when the addition amount of CNTs is 0.1 wt%.Friction coefficient and wear first decreased and then increased,and the lowest values were about 0.15 and 9.63×10m^(3)N^(-1)m^(-1)when CNTs were added at 0.1 wt%,respectively.In the process of friction,appropriate CNTs make the friction film formed on the surface of the material have higher strength and more complete structure,and effectively reduce the friction coefficient and wear rate of the composite material.

关 键 词：CNTS CCG/Cu复合材料 往复摩擦磨损 摩擦磨损机理 力学性能 

分 类 号：TQ[化学工程]