Wear of graphite and PAN-pitch carbon-carbon composites

C. P. Ju, K. J. Lee

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

The present paper reports low-energy wear behavior of two-dimensional (2D) and three-dimensional (3D) PAN-pitch based carbon-carbon composites as well as a commercial bulk graphite. Results indicate that, under the same conditions, the 2D composite at all times has a larger weight loss than those of the 3D composite and the bulk graphite. In the first few minutes of wear, weight loss of the 2D is an order of magnitude higher than those of the other two materials. With time, the wear rate of the 2D keeps decreasing and eventually approaches to a level comparable to the other two materials. Scanning electron microscopy shows that formation of a debris film is critical to the wear behavior of all three materials. Once a smooth, adherent and uniform debris film has been developed on the sliding surfaces, the wear rates dropped at the same time due to a lubricative effect. The much larger wear in the wear-in period, for the 2D composite, might be explained by the quick formation of powdery debris which presumably escapes from the sliding surfaces more easily.

Original languageEnglish
Pages (from-to)1173-1183
Number of pages11
JournalCeramic Engineering and Science Proceedings
Volume14
Issue number9 -10 pt 2
DOIs
Publication statusPublished - 1993 Jan 1
EventProceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials - Cocoa Beach, FL, USA
Duration: 1993 Jan 101993 Jan 15

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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