ISSN   1004-0595

CN  62-1224/O4

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PF/CNTs-Cu复合材料的制备及其载流摩擦磨损机理研究

Preparation and Current Carrying Wear Properties of PF/CNTs-Cu Composites

  • 摘要: 以酚醛树脂(PF)、碳纳米管(CNTs)和泡沫铜(Cu)为原料,在反应釜内经无压浸渗和加压固化技术,制得一种新型PF/CNTs-Cu复合材料. 在CSM摩擦磨损仪上,对不同CNTs含量的PF/CNTs-Cu复合材料进行了载流摩擦磨损测试. 结果表明:未经CNTs改性的PF/Cu复合材料,摩擦系数和磨损率均最大,摩擦表面存在大量的犁沟痕迹,表现为典型的磨粒磨损. 经CNTs改性后的PF/CNTs-Cu复合材料,载流摩擦磨损性能获得较大程度的改善. 当CNTs质量分数在0.25%~1.0%范围内时,随着CNTs含量的增加,摩擦系数和磨损率逐渐减小,并在质量分数为1.0%时达到最小值. 摩擦磨损机制则由最初的磨粒磨损逐渐转变为黏着磨损. 当CNTs达到1.5%时,由于CNTs的团聚作用,导致复合材料的摩擦磨损性能急剧下降,摩擦磨损机制转变为磨粒磨损和黏着磨损共同作用形式.

     

    Abstract: A new type of copper foam and carbon nanotube reinforced phenolic resin composites was prepared by a pressureless infiltration and pressure curing process. The current carrying friction and wear tests of the composites with varying carbon nanotube contents were carried out using a CSM friction and wear tester. The results show that the composites without carbon nanotube had the largest friction coefficient and wear rate, and a number of furrows existed on the worn surface, so the wear mechanism is abrasive wear. As carbon nanotube was added, the friction and wear properties of the composites were improved to a great extent. With the increasing of carbon nanotube content from 0.25% to 1.0%, the friction coefficient and wear rate decreased gradually and reached the minimum at 1.0%. The wear mechanism changed from abrasive wear to adhesive wear gradually. With increasing carbon nanotube content to 1.5%, the friction and wear properties of the composites decreased sharply due to the agglomeration of carbon nanotube, and the wear mechanism became abrasive wear and adhesive wear.

     

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