Chapter 8. Mechanical Properties of Reaction-Bonded Al2O3/ZrO2 Composites

  1. John B. Wachtman Jr.
  1. D. Holz,
  2. M. Röger,
  3. R. Janssen and
  4. N. Claussen

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314555.ch8

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

How to Cite

Holz, D., Röger, M., Janssen, R. and Claussen, N. (1994) Mechanical Properties of Reaction-Bonded Al2O3/ZrO2 Composites, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314555.ch8

Author Information

  1. Technische Universität Hamburg-Harburg Advanced Ceramics Group 21071 Hamburg, FRG

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375334

Online ISBN: 9780470314555

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Keywords:

  • novel technique;
  • great porosity range;
  • high green strength;
  • high-performance applications;
  • near-net-shapecapability

Summary

The present paper reports on a novel technique to produce high-performance Al2O3/ZrO2 composites by reaction bonding (RBAO process). RBAO with 30 vol.% ZrO2 shows superior mechanical properties, e.g., >750 MPa bending strength and 4.1 MPam1/2 fracture toughness after sintering at 1550°C for 2 h (97 %TD). The RBAO technique together with post-HIPing provides a promising fabrication route for high strength ceramics over a great porosity range, e.g., 100 MPa at 60 %TD, 250 MPa at 70 %TD, and >1100 MPa at >99 %TD. High green strength allows green machining without strength degradation after reaction bonding. Thus, the RBAO technique is suitable for fabrication of structural components with complex shapes.