Effect of C2H2/N2 ratio on tribological and mechanical behavior of carbon nanotube containing brake lining materials prepared through CVD process

Kuo Jung Lee, Mao Hsiang Hsu, Huy Zu Cheng, Jason Shian Ching Jang

Research output: Contribution to journalArticlepeer-review

Abstract

Focus of this study has been placed on the influences of carbon nanotube (CNT) on the mechanical and tribological behavior of CNT containing brake lining materials. The commercial friction powder mixed with the same concentration of catalyst sol was fed into the CVD furnace and different ratio of C 2H2/N2 was adopted to fabricate the CNT containing friction powder. The CNT containing brake lining specimens were fabricated by hot pressing these homemade CNT containing friction powders. Experimental results indicate that the CNT containing brake lining specimens prepared through 30% C2H2 show the lowest open porosity and the highest bulk density. Significant enhancement in mechanical properties of specimens was obtained when the CNT containing friction powders are adopted. The green specimen which was fabricated by hot pressing commercial friction powders shows less stable, higher friction coefficient and larger mass loss during the wear test. On the contrary, the CNT containing brake lining specimens exhibit better performance, lower friction coefficients and lower mass loss. Morphological observations show that smooth, adherent lubricating films are formed on the sliding surface of CNT containing brake lining specimens. Based on the experimental results on friction and wear behavior, although the CNT proves to be beneficial in improving the friction and wear performance of the brake lining materials, too many CNT would result in the higher friction coefficient.

Original languageEnglish
Pages (from-to)1531-1535
Number of pages5
JournalMaterials Transactions
Volume50
Issue number6
DOIs
StatePublished - Jun 2009

Keywords

  • Brake lining
  • Carbon nanotube (CNT)
  • Friction
  • Wear

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