Effect of braking speeds on the tribological properties of carbon/carbon composites

Yu Shu, Chen Jie, Huang Qizhong, Xiong Xiang, Chang Tong, Li Yunping

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

This paper describes the tribological properties of carbon/carbon composites used as braking materials under various braking speeds, in which the materials with three kinds of microstructures were used: rough lamina (sample A), smooth lamina (sample B), and the mixture of rough lamina and smooth lamina (sample C), respectively. Friction tests were carried out through a laboratory dynamometer. Polarized optical microscopy (OM) and scanning electron microscopy (SEM) were used to characterize the microstructure and worn surface. Results indicated that the friction coefficient of sample A reached a peak value at braking speed lower than that in both sample B and sample C. However, when the friction coefficients reached to the peak values the temperature inside the worn surface was observed to be approximately 250°C for all of the samples. The weight losses in all of the samples were observed to increase with increasing braking speed; however, the oxidation losses at speed of 28 m-s-1are higher than that of 30 m-s-1 for all of the samples.

Original languageEnglish
Pages (from-to)1038-1043
Number of pages6
JournalMaterials Transactions
Volume51
Issue number5
DOIs
Publication statusPublished - 2010 May

Keywords

  • Braking speed
  • Carbon/carbon composites
  • Pyrolytic carbon
  • Tribological property
  • Worn surface

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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