Journal of Materials Science

, Volume 43, Issue 13, pp 4541–4549 | Cite as

The effect of graphite addition on the mechanical and tribological properties of pitch-based granular carbon composites

  • A. MéndezEmail author
  • R. Santamaría
  • M. Granda
  • R. Menéndez


The present work deals with the effect of graphite addition on selected mechanical and tribological properties of pitch-based granular carbon composites. Three pitches (a commercial impregnating coal tar pitch, an air-blown pitch and a thermally treated coal tar pitch) and anthracite particles as reinforcing material were used to prepare carbon composites to be tested as carbon brake pads. These carbon composites show good compression strength (from 25.8 to 94.2 MPa) but unstable and high friction coefficients (>0.5). Experimental results have showed that small amounts of graphite addition (2.5 and 5.0 wt%) lead to carbon materials with more stable and lower friction coefficient (<0.3). So, graphite addition promoted the reduction in the wear rate. Finally, compressive strength of carbon composites prepared with modified pitches significantly increases after addition of small amounts of graphite with values from 94 to 128.8 MPa.


Compressive Strength Friction Coefficient Wear Rate Tribological Property Anthracite 


  1. 1.
    Savage G (1993) Carbon–carbon composites. Chapman & Hall, London, pp 156–191CrossRefGoogle Scholar
  2. 2.
    Oh IS, Kim JI, Kim JK, Kim KW, Joo HJ (1999) J Mater Sci 34:4585. doi: CrossRefGoogle Scholar
  3. 3.
    Awasthi S, Wood JL (1998) Adv Ceram Mater 3:449CrossRefGoogle Scholar
  4. 4.
    Blanco C, Santamaría R, Bermejo J, Menéndez R (2000) Carbon 38:1043. doi: CrossRefGoogle Scholar
  5. 5.
    Méndez A, Santamaría R, Granda M, Menéndez R (2005) Wear 258:1706. doi: CrossRefGoogle Scholar
  6. 6.
  7. 7.
    Meltzinger Th, Hüttinger KL (1997) Carbon 35:885. doi: CrossRefGoogle Scholar
  8. 8.
    Menéndez R, Blanco C, Santamaría R, Bermejo J, Suelves I, Herod AA, Kandiyoti R (2001) Energy Fuels 15:214. doi: CrossRefGoogle Scholar
  9. 9.
    Blanco C, Santamaría R, Bermejo J, Menéndez R (2002) Carbon 38:517. doi: CrossRefGoogle Scholar
  10. 10.
  11. 11.
    Menéndez R, Granda M, Bermejo J (1997) Carbon 35:555. doi: CrossRefGoogle Scholar
  12. 12.
    Méndez A, Santamaría R, Menéndez R, Bermejo J (2001) J Anal Appl Pyrolysis 58–59:825. doi: CrossRefGoogle Scholar
  13. 13.
    Méndez A, Santamaría R, Granda M, Menéndez R (2004) Energy Fuels 18:22. doi: CrossRefGoogle Scholar
  14. 14.
    Méndez A, Santamaría R, Granda M, Menéndez R (2003) J Microsc 209:81. doi: CrossRefGoogle Scholar
  15. 15.
    Mang T, Dresel W (2001) Lubricants and lubrication. Willey Publishers, USGoogle Scholar
  16. 16.
    Kim SJ, Cho MH, Cho KH, Jang H (2007) Tribol Int 40:15CrossRefGoogle Scholar
  17. 17.
    Cho MH, Ju J, Kim SJ, Jang H (2006) Wear 260:855CrossRefGoogle Scholar
  18. 18.
    Chang C, Zhang Z, Ye L, Friedrich K (2007) Tribol Int 40:1170CrossRefGoogle Scholar
  19. 19.
    Hashmi SAR, Dwivedi UK, Chand N (2007) Wear 262:1426CrossRefGoogle Scholar
  20. 20.
    Méndez A, Santamaría R, Granda M, Morgan T, Herod AA, Kandiyoti R, Menéndez R (2003) Fuel 82:1241CrossRefGoogle Scholar
  21. 21.
    Yasuda E, Tanabe Y, Manocha M, Kimusa S (1998) Carbon 26:225CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • A. Méndez
    • 1
    • 2
    Email author
  • R. Santamaría
    • 1
  • M. Granda
    • 1
  • R. Menéndez
    • 1
  1. 1.Instituto Nacional del CarbónCSICOviedoSpain
  2. 2.Departamento de Ingeniería de MaterialesE.T.S.I. Minas-Universidad Politécnica de MadridMadridSpain

Personalised recommendations