Tribological performance of brake friction materials containing carbon nanotubes

H. J. Hwang, S. L. Jung, K. H. Cho, Y. J. Kim, H. Jang

Research output: Contribution to journalArticlepeer-review

99 Citations (Scopus)


This study examined brake friction materials containing multi-wall carbon nanotubes (CNTs) to determine their effect on the braking performance. The friction materials were produced using conventional dry mixing methods by substituting barite with CNTs (1.7, 4.7, and 8.5 wt.%). Their tribological properties were examined using both a Krauss type tester and a 1/5 scale brake dynamometer. The physical and tribological properties were affected considerably by the CNT content in the friction material. In particular, the CNT-added friction materials showed improved fade resistance and friction stability. Moreover, the CNTs decreased the friction force oscillation during brake application, which was attributed to the increased damping capacity of the friction materials. However, the CNTs decreased the friction effectiveness owing to the lubricating nature of undispersed CNT bundles, and decreased the thermal conductivity of the friction material due to interfacial coupling effects.

Original languageEnglish
Pages (from-to)519-525
Number of pages7
Issue number3-4
Publication statusPublished - 2010 Feb 4

Bibliographical note

Funding Information:
This study was supported by the Korea Science and Engineering Foundation (KOSEF) through the National Research Lab. Program funded by the Ministry of Science and Technology ( N. R0A-2007-000-10011-0 ).


  • Barite
  • Carbon nanotube
  • Composite
  • Damping
  • Friction coefficient
  • Friction materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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