Effect of Graphite Content on the Tribological Properties of Cu–Graphite–SiO2 Composites

Conference paper

Abstract

Cu–graphite–SiO2 composites with different graphite content were fabricated by vacuum hot-pressing sintering. Pin-on-disk friction and wear tester was used to carry out the friction test and study the tribological behaviors of Cu–graphite composites. The results show that the fabricated composites had good compactness and the relative density reached 96.2%. With increasing graphite content, the density, hardness and electric conductivity of composites all declined. The friction coefficient and wear rate both declined at first and then increased and obtained the lowest value (0.198 and 1.062 mg/m, respectively) at 15% graphite. The composite with 15% graphite showed the best tribological properties. The wear mechanism of composites with lower graphite content is mainly abrasive wear. The wear mechanism of the composite with 15% graphite is plastic deformation. When graphite content increased to 20%, fatigue wear and delamination turned into the wear mechanism of the composite.

Keywords

Cu-graphite Graphite content Friction and wear Wear mechanism 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.Key Laboratory of Advanced Structural Materials, Ministry of EducationChangchun University of TechnologyChangchunChina

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