Chapter 26. Mechanical Properties of Boron Carbide Ceramics

  1. Mrityunjay Singh and
  2. Todd Jessen
  1. Suzuya Yamada1,
  2. Shuji Sakaguchi2,
  3. Kiyoshi Hirao2,
  4. Yukihiko Yamauchi2 and
  5. Shuzo Kanzaki2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294680.ch26

25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3

25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3

How to Cite

Yamada, S., Sakaguchi, S., Hirao, K., Yamauchi, Y. and Kanzaki, S. (2001) Mechanical Properties of Boron Carbide Ceramics, in 25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3 (eds M. Singh and T. Jessen), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294680.ch26

Author Information

  1. 1

    Synergy Ceramics Laboratory Nagoya-shi, Aichi, 463–8687 Japan

  2. 2

    National Industrial Research Institute of Nagoya Nagoya-shi, Aichi, 463–8687 Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2001

ISBN Information

Print ISBN: 9780470375730

Online ISBN: 9780470294680

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Keywords:

  • ceramics;
  • microstructure;
  • composites;
  • atmosphere;
  • microscope

Summary

Mechanical properties of B4C ceramics hot-pressed with no additive and CrB2 particles distributed in the B4C matrix were measured. The flexural strength of 675 MPa and the fracture toughness of 2.5 MPaxm1\2 for the B4C ceramics sintered at 1900°C with no additive were obtained. This high strength is attributed to the fine grained microstructure, which could be produced by hot-pressing at low temperature without significant grain growth using the fine B4C powder. No profound influence on fracture toughness was shown with increasing CrB2 content from 5 to 15 mol%. At 20 mol% CrB2 the fracture toughness was improved to 3.5 MPa M1\2 due to some deflection of propagating cracks, and the flexural strength of 630 MPa was obtained.