Chapter 2. Mechanical Properties of Beta-Silicon Nitride Whisker/Silicon Nitride Matrix Composites

  1. John B. Wachtman Jr.
  1. Lynn J. Neergaard and
  2. Joseph Homeny

Published Online: 28 MAR 2008

DOI: 10.1002/9780470310588.ch2

A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 9/10

A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 9/10

How to Cite

Neergaard, L. J. and Homeny, J. (2008) Mechanical Properties of Beta-Silicon Nitride Whisker/Silicon Nitride Matrix Composites, in A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310588.ch2

Author Information

  1. Department of Materials Science and Engineering Ceramic Materials Division University of Illinois Urbana, IL 61801

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780470374870

Online ISBN: 9780470310588

SEARCH

Keywords:

  • silicon nitride matrix composites;
  • whisker modifKatwn;
  • composite microstructures;
  • ceramic matrix composites;
  • boron nitride

Summary

The mechanical properties of β-Si3N4 whisker/Si3N4 matrix composites were investigated. Both as-received and modified β-Si3N4, whiskers were used to reinforce polycrystalline Si3N4 Whisker modification consisted of low pressure chemical vapor deposition of BN onto whisker surfaces. The whisker surfaces were characterized by XPS, SEM, and TEM. Composites were fabricated via hot pressing. Mechanical properties of the composites, primarily fracture stress and fracture toughness, were measured and compared to those of unreinforced polycrystalline Si3N4 Composite microstructures and fracture surfaces were characterized by SEM.