Effects of Load on the Wear Behaviors of Cu-Based Composite under Different Electrical Currents

Abstract:

A new type Cu-La₂O₃ composite was fabricated by internal oxidation method using powder metallurgy. The sliding behavior of the Cu-La₂O₃ composites was studied using a pin-on-disk wear tester under different electrical currents and different applied loads. The worn surfaces were examined using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) to determine the wear mechanisms. The results showed that the wear rate and friction coefficient of the La₂O₃ composites pins increased with the increase of the applied load at low electrical current, while at high electrical current the wear rate and friction coefficient decreased firstly and then increased as the applied load increased. The main wear mechanisms of the Cu-La₂O₃ composites were found to be adhesive wear, abrasive wear, oxidation wear and arc erosion.

• Periodical: Advanced Materials Research (Volumes 706-708)
• Pages: 90-94
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.706-708.90
• Online since: June 2013
• Authors: Run Guo Zheng, Zai Ji Zhan
• Keywords: Arc Discharge, Electrical Contacts, Sliding Wear

References

[1] S.C. Tjong, K.C. Lau: Mater. Sci. Eng., A Vol. 282(2000), P. 183

[2] J.P.Tu, W.Rong, S.Y. Guo, Y.Z. Yang: Wear Vol. 255(2003), P. 832

[3] L.M. Peng: Scripta Materialia Vol. 56(2007), P.729.

[4] Y.Zhan, G.Zhang: Material Letters Vol. 57(2003), P.4583

[5] Zhang Houan, Wang Dezhi, Chen Shiping, Liu Xinyu: Mater. Sci. Eng., A Vol. 345(2003), P.118

[6] Zhang Houan, Hua Xiaoping, Yan Jianhui, Chen Ping, Tang Siwen: Wear Vol.260(2006), P.903

[7] Michael D Bryant:IEEE transactions on component, hybrid, manufacturing technology, Vol. 14(1991), P.71

[8] Kuhlmam-Wilsdorf D :Wear Vol. 200(1996), P.8

[9] Har Prashad:Tribology in Electrical Environments (Elsevier Science, 2005)

[10] Paulmier D, Bouchoucha A. H Zaidi: Vacuum Vol. 41(1990), P.2213