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

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

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Carbon carbon composites
Graphitization
Wear of materials
Electrons
Transmission electron microscopy
Scanning electron microscopy
Amorphization
Polyacrylonitriles
Amorphous films
Debris
Microstructure
Fibers
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

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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.",
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Electron microscopic study of worn pan-pitch based carbon-carbon composite. / Lee, K. J.; Chern, Jiin-Huey; Ju, Chien-Ping.

In: Carbon, Vol. 35, No. 5, 01.01.1997, p. 613-620.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Lee, K. J.

AU - Chern, Jiin-Huey

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