Chapter 25. Synthesis and Densification of Oxide-Carbide Composites

  1. William Smothers
  1. R. A. Cutler1,
  2. A. V. Virkar2 and
  3. J. B. Holt3

Published Online: 26 MAR 2008

DOI: 10.1002/9780470320280.ch25

Proceedings of the 9th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 6, Issue 7/8

Proceedings of the 9th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 6, Issue 7/8

How to Cite

Cutler, R. A., Virkar, A. V. and Holt, J. B. (1985) Synthesis and Densification of Oxide-Carbide Composites, in Proceedings of the 9th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 6, Issue 7/8 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320280.ch25

Author Information

  1. 1

    Ceramatec, Inc. Salt Lake City, UT84115

  2. 2

    University of Utah Salt Lake City, UT 84112

  3. 3

    Lawrence Livermore Laboratory Livermore, CA 94550

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1985

ISBN Information

Print ISBN: 9780470374337

Online ISBN: 9780470320280

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Keywords:

  • oxide-carbide;
  • MgO-based;
  • metal oxide;
  • porous mixtures of oxides;
  • ceramic-metal composites

Summary

Exothermic reactions were used to synthesize Al2O3-TiC, Al2O3SiC, MgOSiC, and similar oxide-carbide composites by metallothermically reducing oxides in the presence of carbon. Pressureless sintering of Al2O3-TiC composites was possible, and unique microstructures consisting of river patterns of TiC in Al2O3 resulted. Similar microstructures were observed in hot-pressed Al2O3-SiC composites. Mechanical properties similar to that of conventional cutting tools were achieved by milling synthesized powders prior to densification so that the carbide phase was well dispersed within the alumina matrix. Transformation-toughened composites using zirconia additions resulted in improved toughness. Submicron SiC and TiC were prepared by acid leaching MgO-based, synthesized powders.