Electron microscopic study of worn pan-pitch based carbon-carbon composite

K. J. Lee, J. H. Chern Lin, C. P. Ju

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM)/microdiffraction techniques have been used to characterize the microstructure of a polyacrylonitrile (PAN)-based fiber-reinforced mesophase pitch-based matrix carbon-carbon (C-C) composite before and after sliding at two different speeds. Emphasis was placed on the study of wear-induced amorphization and graphitization phenomena. The results indicated that both phenomena were observed in the debris film of the high speed-slid specimens. The wear-induced amorphous film was identified by the diffuse rings/halos in SAD patterns, while the numerous graphitized particles were confirmed by bright and dark field images, SAD and microdiffraction patterns. The wear-induced graphitization phenomenon suggests that the asperity temperatures should be high enough for graphitization to take place at local spots, particularly in the more graphitizable pitch-based matrix.

Original languageEnglish
Pages (from-to)613-620
Number of pages8
JournalCarbon
Volume35
Issue number5
DOIs
Publication statusPublished - 1997 Jan 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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