Chapter 61. Consolidation of Diamond and SiC Particulate Preforms by the Forced Flow-Thermal Gradient Diamond CVI Process

  1. John B. Wachtman Jr.
  1. Jong-Heon Lee1,
  2. James F. Benzel1 and
  3. W. Jack Lackey2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314784.ch61

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5

How to Cite

Lee, J.-H., Benzel, J. F. and Lackey, W. J. (1995) Consolidation of Diamond and SiC Particulate Preforms by the Forced Flow-Thermal Gradient Diamond CVI Process, in Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314784.ch61

Author Information

  1. 1

    School of Materials Science and Engineering Georgia Institute of Technology Atlanta, GA 30332-0245

  2. 2

    Materials Science and Technology Branch Georgia Tech Research Institute Atlanta, GA 30332-0800

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1995

ISBN Information

Print ISBN: 9780470375389

Online ISBN: 9780470314784

SEARCH

Keywords:

  • emissions;
  • modification;
  • stability;
  • utilize;
  • trapezoidal

Summary

The forced flow-thermal gradient diamond CVI process was used in an attempt to densify and consolidate SiC and diamond preforms by forcing the stream of reagent gases through the preforms for infiltration of diamond coatings. Reasonable quality polycrystalline diamond was deposited on the cold surface of SiC preforms where the concentration of reagent gases was high. The growth rate of diamond on SiC preforms was increased from 0.085 to 0.5 μm/h when the deposition temperature and time were increased. Graphite fibers were deposited throughout a diamond preform using a mixture of H2 and CH4.