Influence of applied load on wear behavior of C/C-Cu composites under electric current

• Main Authors: Jian Yin, Hongbo Zhang, Xiang Xiong, Huijin Tao, Pei Wang, Chaoyong Deng
• Format: Article
• Language: English
• Published: Elsevier 2017-04-01
• Series: Progress in Natural Science: Materials International
• Subjects: Carbon/Carbon-Copper composites; Pantograph slider; Wear; Electric current; Applied load
• Online Access: http://www.sciencedirect.com/science/article/pii/S1002007117302125

Using carbon fiber needled fabrics with Cu-mesh and graphite powder as the preform, Cu mesh modified carbon/carbon(C/C-Cu) composites were prepared by chemical vapor deposition (CVD) with C3H6 and impregnation-carbonization (I/C) with furan resin. C/C composites, as a comparison, were also prepared. Their microstructures and wear morphologies were observed by optical microscopy (OM) and scanning electron microscope (SEM), respectively. Wear behavior of C/C and C/C-Cu composites under different applied loads were investigated on a pin-on-disc wear tester. The results show that Cu meshes are well dispersed and pyrolytic carbon is in rough laminar structure. Both C/C and C/C-Cu composites had good wear properties. The current-carrying capacity of C/C-Cu composites increases and the arc discharge is hindered as the applied load increases from 40 N to 80 N. Both C/C and C/C-Cu composites had good wear properties. The mass wear rate of C/C-Cu composites under 80 N was only 4.2% of that under 60 N. In addition, C/C-Cu composites represent different wear behaviors because wear mechanisms of arc erosion, abrasive wear, adhesive wear, and oxidative wear are changing under different applied loads.