Chapter 18. Matrix Grain Size Effect and Fracture Bmamor on Bending Strength and Fracture Toughness in Multi-Toughened Al2O3

  1. John B. Wachtman Jr.
  1. K. Ikeda1 and
  2. T. Kishi2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313954.ch18

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8

How to Cite

Ikeda, K. and Kishi, T. (1994) Matrix Grain Size Effect and Fracture Bmamor on Bending Strength and Fracture Toughness in Multi-Toughened Al2O3, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313954.ch18

Author Information

  1. 1

    Grad- School, the University of Tokyo c/o Kishi Laboratory, Research Center for Advanced Science and Technology, the University of Tokyo 4–6–1 Komaba, Tokyo 153, Japan

  2. 2

    Research Center for Advanced Science and Technology, the University of Tokyo 4–6–1 Komaba, Tokyo 153, Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375174

Online ISBN: 9780470313954

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Keywords:

  • materials;
  • mechanism;
  • monolithic;
  • temperature;
  • microscope

Summary

Al2O3 was reinforced with SiC -whisker and SiC -platelet as model material for multi-toughening effect. All materials were fabricated by same procedure to neglect the effect of process difference. Grain size distribution was strongly affected by the shape and mass fraction of reinforcement, and the distribution changed fracture style in fracture surface. It was found that bending strength can be evaluated by Petch's law as first-order approximation. Compared with single-toughening composites, fracture toughness was highly improved in multi-toughening composite. Deflection by platelet improved fracture toughness in case of fine matrix grain composites, and no interaction between whisker and platelet was observed.