26. Finite Element Analysis of the Bonded Compliant Seal Design—A New Sealing Concept for Use in Planar Solid Oxide Fuel Cells

  1. Narottam P. Bansal
  1. B. J. Koeppel and
  2. K. S. Weil

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291245.ch26

Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4

Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4

How to Cite

Koeppel, B. J. and Weil, K. S. (2005) Finite Element Analysis of the Bonded Compliant Seal Design—A New Sealing Concept for Use in Planar Solid Oxide Fuel Cells, in Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4 (ed N. P. Bansal), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291245.ch26

Author Information

  1. Pacific Northwest National Laboratory P. O. Box 999 Richland, WA 99352

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982343

Online ISBN: 9780470291245

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Keywords:

  • coefficient of thennal expansion;
  • ceramic cell;
  • sealing material;
  • metal separator;
  • brazing tempture.

Summary

A key issue in developing commercially viable planar solid oxide fuel cell stacks is appropriate seal design. We are currently developing an alternative approach to rigid and compressive seal designs that conceptually combines advantages of both techiques, including hermeticity, mechanical integrity, and minimization of interfacial stresses in either of the joint substrate materials, particulary the ceramic. The new seal relies on a plastically deformable metal seal; one that offers a quasi-dynamic mechanical response in that it is adherent to both sealing surfaces, i. e. non-sliding, but readily yields or deforms under thermally generated stresses. In this way, we hope to mitigate the development of stresses in the adjacent ceramic and metal components even when a significant difference in thermal expansion exists between the two materials. Here we employ finite element modeling to assess the potential thermal cycling performance of this design, specifically as it pertains to sealing components with vastly different thermal expansion properties.