Chapter 12. Microcrack Toughening in TiB2-AIN Composite
- John B. Wachtman Jr.
Published Online: 28 MAR 2008
Copyright © 1989 The American Ceramic Society, Inc.
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. (1989) 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
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1989
Print ISBN: 9780470374870
Online ISBN: 9780470310588
- fracture mechanisms;
- crack su faces;
- macroscopic properties
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.