Chapter 65. A SiC/Combustion-Synthesized β′-SiAlON Composite

  1. John B. Wachtman Jr.
  1. Chao M. Huang,
  2. Youren Xu,
  3. Dong Zhu and
  4. Waltraud M. Kriven

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314555.ch65

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

Huang, C. M., Xu, Y., Zhu, D. and Kriven, W. M. (1994) A SiC/Combustion-Synthesized β′-SiAlON Composite, 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.ch65

Author Information

  1. Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801

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:

  • ultimate flexure strength;
  • filament push-out tests;
  • moderate interfacial bondmg strength;
  • SEm observation;
  • pushed-out filaments

Summary

A composite of combustion-synthesized β′-SiAlON (Si3Al3O3N5) reinforced with SiC monofilaments (AVCO SCS-6) was hot-pressed at a temperature of 1600 °C for 2 h under a pressure of 34 MPa. The composite exhibited significant improvement in work of fracture (WOF) as well as in ultimate strength, in comparison to monolithic β′-SiAlON. Ultimate flexure strength values between 682 and 793 MPa for the composite and between 398 and 528 MPa for the monolithic β′ SiAlON were obtained. A work of fracture of 16.7 kJ m−2 Was obtained for the composite, compared to 2.7 kJ m−2 for the monolithic material. Filament push-out tests revealed a moderate interfacial bonding strength of 26 MPa and a frictional sliding stress of 24 MPa. SEM observation of pushed-out filaments indicated that the debonding site was located at the interface between the outer carbon layer of the filament and the matrix. It appeared that the filament and the matrix were compatible with each other despite the fact that the matrix contained 20 wt% of Al2O3 as a secondary phase.