KSTLE International Journal

Korean Tribology Society (한국트라이볼로지학회)
권호 표지

Tribological Properties of Carbonaceous Ingredients such as Natural Graphite, Artificial Graphite, and Cokes in Automotive Brake Friction Materials

  • Kim, Yoon-Jun (Department of Materials Science and Engineering, Korea University) ;
  • Lee, Kang-Sun (Materials Research Team, Hyundai-Kia Motors) ;
  • Park, Sung-Bin (Department of Materials Science and Engineering, Korea University) ;
  • Jang, Ho (Department of Materials Science and Engineering, Korea University)
  • Received : 2009.11.05
  • Accepted : 2009.11.11
  • Published : 2009.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

Influences of carbonaceous ingredient as a solid lubricant in automotive friction materials on friction properties were studied. Three types of carbonaceous ingredients such as natural graphite, artificial graphite, and cokes were mixed using a constrained mixture design. A 1/5 scale brake dynamometer was used to obtain tribological properties. Results showed that cokes substantially increased the friction coefficient, and natural graphite effectively reduced stick-slip phenomena. This significant difference was attributed to the formation of the friction film on the brake pad which was shown to be strongly dependent on the graphite types. The different crystal structures of the carbonaceous solid lubricants played a significant role in the formation of friction film at the interface.

Keywords

References

  1. B. Bhushan, Introduction to Tribology, John Wiley and Sons, New York, pp. 251-277, 2002
  2. E. Rabinowicz, Friction and Wear of Materials, 2nd Edition, Wiley, New York, pp. 96-104, 1995
  3. F.P. Bowden, D. Tabor, The Friction and Lubrication of Solids, Oxford University Press, Oxford, pp. 105, 1953
  4. A.A. Polycarpou, A. Soom, Wear 181-183, 32, 1995 https://doi.org/10.1016/0043-1648(94)07049-0
  5. G.R. Symmons, G.J. McNulty, Wear 113, 79, 1986 https://doi.org/10.1016/0043-1648(86)90057-8
  6. C. Gao, D. Kuhlmann-Wilsdorf, ASME J. Tribol. 112, 354,1990 https://doi.org/10.1115/1.2920264
  7. S.J. Kim, M.H. Cho, D.S. Lim, H. Jang., 'Synergisticc effects of aramid pulp and potassium titanate whiskers in the automotive friction materials,' wear 251, 1484-1491, 2001 https://doi.org/10.1016/S0043-1648(01)00802-X
  8. S.J. Kim, K.S. Kim, H. Jang., 'Optimization of manufacturing parameters for a brake lining using Taguchi method,' Journal of Materials Processing technology 136, 202-208, 2003 https://doi.org/10.1016/S0924-0136(03)00159-6
  9. O. Beyssac et al. 'On the characterization of disordered and heterogeneous carbonaceous materials by Raman spectroscopy,' Spectrochimica Acta Part A 59, 2267-2276, 2003 https://doi.org/10.1016/S1386-1425(03)00070-2