Interface and Microstructure Development in Carbon/Carbon Composites

  • Mathur, R.B. (Carbon Technology Unit, Division of Engineering Materials, National Physical Laboratory) ;
  • Bahl, O.P. (Carbon Technology Unit, Division of Engineering Materials, National Physical Laboratory) ;
  • Dhami, T.L. (Carbon Technology Unit, Division of Engineering Materials, National Physical Laboratory) ;
  • Chauhan, S.K. (Carbon Technology Unit, Division of Engineering Materials, National Physical Laboratory) ;
  • Dhakate, S.R. (Carbon Technology Unit, Division of Engineering Materials, National Physical Laboratory) ;
  • Rand, B. (Department of Materials,University of Leeds)
  • Received : 2004.01.30
  • Accepted : 2004.04.30
  • Published : 2004.06.30

Abstract

Performance of carbon-carbon composites is known to be influenced by the fibre matrix interactions. The present investigation was undertaken to ascertain the development of microstructure in such composites when carbon fibres possessing different surface energies (T-300, HM-35, P120 and Dialed 1370) and pitch matrices with different characteristics (Coal tar pitch $SP110^{\circ}C$ and mesophase pitch $SP285^{\circ}C$) are used as precursor materials. These composites were subjected to two different heat treatment temperatures of $1000^{\circ}C$ and $2600^{\circ}C$. Quite interesting changes in the crystalline parameters as well as the matrix microstructure are observed and attempt has been made to correlate these observations with the fibre matrix interactions.