Chapter 23. Analysis of the Bridging Zone Contribution to the R-Curve Behavior of Sic-Platelet-Reinforced Alumina Using the Chevron-Notched Bend Bar Specimen

  1. Don Bray
  1. G. Reza Sarrafi-Nour and
  2. Thomas W. Coyle

Published Online: 23 MAR 2010

DOI: 10.1002/9780470294499.ch23

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

How to Cite

Sarrafi-Nour, G. R. and Coyle, T. W. (1998) Analysis of the Bridging Zone Contribution to the R-Curve Behavior of Sic-Platelet-Reinforced Alumina Using the Chevron-Notched Bend Bar Specimen, in 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4 (ed D. Bray), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294499.ch23

Author Information

  1. Department of Metallurgy & Materials Science University of Toronto Toronto ON M5S 3E4 Canada

Publication History

  1. Published Online: 23 MAR 2010
  2. Published Print: 1 JAN 1998

ISBN Information

Print ISBN: 9780470375594

Online ISBN: 9780470294499

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Keywords:

  • radiation;
  • oxygen lancing;
  • oxy-fuel;
  • consumption;
  • combustion

Summary

The effect of platelet reinforcements on the toughening of ceramic matrices has been the focus of several studies over the past few years. Although the strength performance of ceramics reinforced by platelets is inferior to their whisker-reinforced counter parts, comparable toughening effects can be obtained. Similar to whisker-reinforced materials, R-curve behavior can also be observed in some platelet reinforced ceramics, including alumina reinforced with SiC-platelets. Results of R-curve studies on a composite of alumina containing 20 vol.% SiC-platelets in the long crack regime are presented in this work. The R-curves were obtained using chevron-notched bend bar specimens. The weight function method was used to extract from the curves the magnitude and range of bridging tractions in this material. These results indicated similar levels of bridging tractions exist in both whisker and platelet reinforced material.