Effects of fiber volume fraction and thermal treatment on the properties of C/C composites

Jianguo Zhao, Kezhi Li, Hejun Li

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The hardness of C/C composites is reinforced with the increasing of the fiber volume fraction. When the carbon fiber volume fraction is over 30%, the hardness of C/C composites keeps constant. The bending strength of C/C composites is reinforced with the increasing of the fiber volume fraction. High fiber volume fraction results in smaller holes in preforms which can not be well filled by pyrocarbon, so the bending strength will decline. Therefore, there is an inflexion with the increasing of the fiber volume fraction. There are three fracture mechanisms-brittle fracture, pseudo plastic fracture by which whole bundle fiber are drawn, and pseudo plastic fracture by which portion fiber are put out, in accordance with the variation of the thermal treatment temperature of fibers. C/C composites with excellent mechanical properties were obtained after heat treatment of carbon fibers at 1600°C.

Original languageEnglish
Pages (from-to)293-298
Number of pages6
JournalCailiao Yanjiu Xuebao/Chinese Journal of Materials Research
Volume19
Issue number3
StatePublished - Jun 2005

Keywords

  • Carbon/Carbon composites
  • Composites
  • Mechanical properties
  • Pyrocarbon
  • Volume fraction

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