Chapter 78. Strength and Toughness of Ceramic-Metal Composites Prepared by Reactive Hot Pressing

  1. Todd Jessen and
  2. Ersan Ustundag
  1. Donald T. Ellerby1,
  2. Ronald E. Loehman1 and
  3. William G. Fahrenholtz2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294628.ch78

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3

How to Cite

Ellerby, D. T., Loehman, R. E. and Fahrenholtz, W. G. (2000) Strength and Toughness of Ceramic-Metal Composites Prepared by Reactive Hot Pressing, in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294628.ch78

Author Information

  1. 1

    Sandia National Laboratories 1001 University Blvd. SE, Suite 100 Albuquerque, NM 87106

  2. 2

    Ceramic Engineering Department University of Missouri-Rolla Rolla, MO 65409

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2000

ISBN Information

Print ISBN: 9780470375686

Online ISBN: 9780470294628

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Keywords:

  • ceramic-metal composites;
  • ceramic-intermetallic composites;
  • reactive hot pressing;
  • stoichiometry;
  • displacement reaction

Summary

Metal-reinforced A1203-matrix composites were prepared using reactive hot pressing. The volume fraction of the reinforcing phase was controlled by the stoichiometry of the particular displacement reaction used. Dense Al2O3-Ni and Al2O3-Nb composites were fabricated using this technique. The best combination of strength, 610 MPa, and toughness, 12 MPam1/2, was found for the Al2O3-Ni composites. Indentation cracks and fracture surfaces showed evidence of ductile deformation of the Ni phase. The Al2O3-Nb composites had high strength, but the toughness was lower than expected due to the poor bonding between the Nb and Al2O3 phases.