Chapter 33. Fracture Test of Thin Sheet Electrolytes

  1. Narottam P. Bansal,
  2. Andrew Wereszczak and
  3. Edgar Lara-Curzio
  1. Jürgen Malzbender,
  2. Rolf W. Steinbrech and
  3. Lorenz Singheiser

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291337.ch33

Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4

Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4

How to Cite

Malzbender, J., Steinbrech, R. W. and Singheiser, L. (2006) Fracture Test of Thin Sheet Electrolytes, in Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4 (eds N. P. Bansal, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291337.ch33

Author Information

  1. Forschungszentrum Jülich GmbH Institute for Materials and Processes in Energy Systems 52425 Juelich, Germany

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780470080542

Online ISBN: 9780470291337

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Keywords:

  • electrolyte;
  • phenomenon;
  • zirconia;
  • methodology;
  • parameters

Summary

In electrolyte supported planar design of solid oxide fuel cells the fracture stress of the electrolyte foil determines the limit of mechanical cell integrity. However, measurement of the fracture stress of thin sheet specimens is a difficult task since high local stresses are usually obtained in bending tests where the deflection exceeds half the sheet thickness before fracture. In addition to conventional bi-axial bending tests a new method is presented to characterize the fracture stress of 100μm 6ScSZ electrolyte foils. Ring-on-ring tests are carried out with composite specimens where the thin electrolyte foil is glued to a steel substrate. The method permits to correlate the fractures stress with the stressed surface area and hence allows a prediction of failure stresses and probabilities for real size cells.