Chapter 50. Evolution of Defects in Pressed and Sintered Electroceramic Components
- Waltraud M. Kriven and
- Hua-Tay Lin
Published Online: 26 MAR 2008
Copyright © 2003 The American Ceramic Society
27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4
How to Cite
Danzer, R., Börger, A. and Fellner, M. (2003) Evolution of Defects in Pressed and Sintered Electroceramic Components, in 27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4 (eds W. M. Kriven and H.-T. Lin), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294826.ch50
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 2003
Print ISBN: 9780470375846
Online ISBN: 9780470294826
- electro ceramic components;
- thermo elastic stresses;
Electro ceramic components often mechanically fail due to Joule self heating and thermo elastic stresses. In general the brittle failure starts from defects which are distributed within the material and which are generated during the processing of the components. Mechanical strength as well as life-time of the components can largely be improved, if these defects are eliminated or if their size an frequency is reduced.
This work is focused on the description of methods to investigate how dangerous defects come into existence. Microscopy and fractography of granulates, green and sintered bodies are used to trace back the evolution of fracture causing defects. Examples of the genesis of defects from flaws in agglomerates and green bodies to defects in ceramics are given.
In the industrial practice this knowledge can be used to improve the mechanical strength and the reliability of the components.