Chapter 12. Microcrack Toughening in TiB2-AIN Composite

  1. John B. Wachtman Jr.
  1. W. A. Zdaniewski and
  2. B. O. Yavuz

Published Online: 28 MAR 2008

DOI: 10.1002/9780470310588.ch12

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

Zdaniewski, W. A. and Yavuz, B. O. (2008) Microcrack Toughening in TiB2-AIN Composite, 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.ch12

Author Information

  1. Engelhard Corp. Edison, NJ

Publication History

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

ISBN Information

Print ISBN: 9780470374870

Online ISBN: 9780470310588

SEARCH

Keywords:

  • fracture mechanisms;
  • ceramics;
  • crack su faces;
  • fibers;
  • macroscopic properties

Summary

Stress-induced microcrack toughening of TiB2-AIN composite was investigated in the 77-1070 K temperature range. The toughness was proportional to the thermoelastic mismatch induced by cooling and reached 5.7 MPa m1/2 at cryogenic temperatures. Scanning electron microscope observations confirmed microcrack formation during loading at low T. During fracture, microcracking suppressed fracture mirror formation; however, as the thermoelastic mismatch decreased with temperature, typical fracture mirrors were observed.