32. Fracture Energies of Brittle Sealants for Planar Solid Oxide Fuel Cells

  1. Narottam P. Bansal
  1. Jürgen Malzbender1,
  2. Rolf W. Steinbrech1,
  3. Lorenz Singheiser1 and
  4. Peter Batfalsky2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291245.ch32

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

Malzbender, J., Steinbrech, R. W., Singheiser, L. and Batfalsky, P. (2005) Fracture Energies of Brittle Sealants for 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.ch32

Author Information

  1. 1

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

  2. 2

    Forschungszentrum Jülich GmbH Zentralabteilung Technologie 52425 Jülich, Germany

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:

  • planar solid oxide fuel;
  • fomhungszentrum juelich;
  • glass-ceramic;
  • temperature;
  • material

Summary

Glass-ceramics are often used in stacks of planar solid oxide fuel cell (SOFC) design to join ceramic and metallic components and to seal anode and cathode compartment. Fracture mechanics tests were carried out to characterize the mechanical behavior of such brittle sealants in case of metal and ceramic coated metal bonding. Expansion adjusted glass-ceramics of the Ba-Ca-Aluminosilicate type were used to join specimen strips of ferritic interconnect steel. For coating air plasma sprayed yttria stabilized zirconia was used. The specimens with the sealant sandwiched between steel and/or coated steel were tested in notched bi-material flexure beam geometry. The fracture energy was determined at room temperature as a function of glass-ceramic variant and joining parameters. Complimentary fractography provided information about the location of the crack path. The influence of glass-ceramic crystallization and metallic oxide scale formation on the fracture resistance is discussed.