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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