Chapter 9. Novel Siliconized Mixed-Phase Ceramics

  1. John B. Wachtman Jr.
  1. A. J. Whitehead1,
  2. T. F. Page1 and
  3. I. Higgins2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470310588.ch9

A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 9/10

A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 9/10

How to Cite

Whitehead, A. J., Page, T. F. and Higgins, I. (2008) Novel Siliconized Mixed-Phase Ceramics, in A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310588.ch9

Author Information

  1. 1

    University of Newcastle-upon-Tyne Newcastle-upon-Tyne, UK

  2. 2

    UKaEa, Springfields Preston, UK

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780470374870

Online ISBN: 9780470310588

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Keywords:

  • ceramics;
  • silicides;
  • molybdenum disilicide;
  • vapor-liquid-solid whiskers;
  • huber corporation

Summary

A series of novel, silicon carbide-based, mixed-phase ceramics have been fabricated by a reaction-bonding (siliconizing) route normally used for silicon carbide. Besides silicon carbide and graphite, the initial powder mixes contained one of a number of refractory metal carbides chosen with regard to their thermodynamic stability with respect to silicon carbide at the reaction-bonding temperature. The materials have been characterized using a variety of microstructural and microanafytical techniques including light microscopy, SEM, EDX, and XRD. The results of the microstructural characterization have been utilized to explain the microstructural evolution of the various materials. In practice, most of the chosen metal carbides were unstable with respect to their silicides, and silicide-silicon eutectics appear to play a role in microstructural genesis.