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

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  • Release time:2021-07-16

  • DOI number:10.2320/matertrans.M2009390

  • Affiliation of Author(s):中南大学

  • Journal:Materials Transactions

  • Key Words:carbon/carbon composites,pyrolytic carbon,tribological property,braking speed,worn surface

  • 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 degrees 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(-1) are higher than that of 30 m.s(-1) for all of the samples

  • Indexed by:Article

  • Discipline:Engineering

  • First-Level Discipline:Materials Science and Engineering

  • Document Type:J

  • Volume:51

  • Issue:5

  • Page Number:1038-1043

  • ISSN No.:1345-9678

  • Translation or Not:no

  • Date of Publication:2010-05-17

  • Included Journals:SCI


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