Chapter 59. The Nitridation of High Purity, Laser-Synthesized Silicon Powder to Form Reaction Bonded Silicon Nitride

  1. John B. Wachtman Jr.
  1. B. W. Sheldon and
  2. J. S. Haggerty

Published Online: 28 MAR 2008

DOI: 10.1002/9780470310496.ch59

Proceedings of the 12th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 7/8

Proceedings of the 12th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 7/8

How to Cite

Sheldon, B. W. and Haggerty, J. S. (1988) The Nitridation of High Purity, Laser-Synthesized Silicon Powder to Form Reaction Bonded Silicon Nitride, in Proceedings of the 12th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310496.ch59

Author Information

  1. Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge, MA 02139

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780470374801

Online ISBN: 9780470310496

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Keywords:

  • microstructural;
  • ductility;
  • oxidation;
  • laminates;
  • energy dispersive spectroscopy

Summary

The nitriding kinetics of high purity 0.2 μm Si powders made from laser heated SiH, gas were studied with thermogravimetric analysis (TGA), X-ray diffraction, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Compared to conventional reaction bonded Si3N4 (RBSN), crapidly and at lower temperatures (e.g., >97% conversion in less than ten minutes at 1250°C). Samples exhibited unusual reverse reaction gradients with more nitridation occurring inside of pellets than at the outer surfaces. Exposure to methanol retarded nitridation.