Chapter 4. Mechanical Failure and Mechanical Design of Electroceramic Components

  1. Waltraud M. Kriven and
  2. Hua-Tay Lin
  1. Robert Danzer and
  2. Peter Supancic

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294826.ch4

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4

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. and Supancic, P. (2003) Mechanical Failure and Mechanical Design of 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.ch4

Author Information

  1. Institut für Struktur- und Funktionskeramik Montanuniversität Leoben, A-8700 Leoben, Austria and Materials Center Leoben, A-8700 Leoben, Austria

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375846

Online ISBN: 9780470294826

SEARCH

Keywords:

  • electroceramic;
  • thennomechanical;
  • inhomogeneous;
  • miniaturisation;
  • mechanical stresses

Summary

Every year several billions of electroceramic components fail due to mechanical stresses. Largely this is a consequence of thermomechanical stresses occurring due to inhomogeneous Joule selfheating of the components. With the trend towards miniaturisation and increasing power densities of the components, this problem will be more severe in the future. Nowadays an electrical proof test of highly loaded components is usual. In such a test a significant share of the production is mechanically destroyed in some critical cases. Nevertheless very few papers on this topic are found in the literature. In this paper some work on mechanical stresses and failure modes in varistors and PTCs performed at the Montanuniversität Leoben, Austria and at the Materials Center Leoben (founded to foster the transfer of science from universities to industry), is summarised.