Chapter 8. Mechanical Properties of Reaction-Bonded Al2O3/ZrO2 Composites
- John B. Wachtman Jr.
Published Online: 28 MAR 2008
Copyright © 1994 The American Ceramic Society
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
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1994
Print ISBN: 9780470375334
Online ISBN: 9780470314555
- novel technique;
- great porosity range;
- high green strength;
- high-performance applications;
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.