Preferential distribution and oxidation inhibiting/catalytic effects of boron in carbon fiber reinforced carbon (CFRC) composites

Young Jae Lee, Hyeok Jong Joo, Ljubisa R. Radovic

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Two different batches of CFRC composites were prepared in the absence/presence of B with the expectation of increasing oxidation stability and improving the processing compatibility of CFRC composites in commercial applications. The composites were examined to reveal the nature of substitutional B in oxidation, crystallinity and distribution preference in the composites. Substitutional B acts both a catalyst and an inhibitor in carbon oxidation, depending on the content and the extent of carbon burn-off reaction. Crystallinity increases with the incorporation of B, as expected; d 002 decreases, and Lc and La increase. Boron prefers to be distributed in the less ordered structure; non-graphitizable PAN-based carbon fibers have higher B contents than graphitizable coal-tar pitch, but processing conditions can change this preference. The incorporation of B in CFRC composites seems to be beneficial for improving the potential ability of the composites in applications by increasing crystallinity and oxidation stability.

Original languageEnglish (US)
Pages (from-to)2591-2600
Number of pages10
JournalCarbon
Volume41
Issue number13
DOIs
StatePublished - 2003

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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