Chapter 27. Crack-Particle Interactions in Alumina-Iron Composites
- John B. Wachtman Jr.
Published Online: 26 MAR 2008
Copyright © 1993 The American Ceramic Society
Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10
How to Cite
Trusty, P. A. and Yeomans, J. A. (1993) Crack-Particle Interactions in Alumina-Iron Composites, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314234.ch27
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1993
Print ISBN: 9780470375273
Online ISBN: 9780470314234
Two morphologically different composites comprising an alumina matrix and 20 vol% iron particles have been fabricated by hot pressing powder blends. The composites differ in the size, shape and distribution of iron particles. The fracture toughness of each composite has been obtained using a double cantilever beam technique inside a scanning electron microscope. Both composites have been found to have a fracture toughness value which is at least twice that of the monolithic alumina. The in situ testing has enabled various toughening mechanisms to be monitored on a microscopic level. The overall fracture toughness value can be related to the sum of the contributions from these mechanisms and hence to the microstructure.