31. Mechanical Properties of SOFC Seal Glass Composites

  1. Narottam P. Bansal
  1. Sung R. Choi and
  2. Narottam P. Bansal

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291245.ch31

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

Choi, S. R. and Bansal, N. P. (2005) Mechanical Properties of SOFC Seal Glass Composites, 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.ch31

Author Information

  1. NASA Glenn Research Center, Cleveland, OH 44135

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:

  • barium calcium aluminosilicate;
  • solid oxide fuel cells;
  • pacific north national laboratory;
  • alpha alumina hexagonal platelets;
  • glass composites

Summary

A barium calcium aluminosilicate (BCAS) glass of composition (mol%) 35BaO-15CaO-5Al2O3-10B2O3-35SiO2 that is being investigated as sealing material for planar solid oxide fuel cells was reinforced with alumina platelets or 3 mol% yttria-stabilized zirconia (YSZ) particulates to improve its strength and fracture toughness. For the same ceramic content, composites containing alumina platelets showed much higher strength and fracture toughness than those with YSZ. For 30 mol% reinforcement, flexure strength of the glass improved by 230 % and 130 %, respectively, for alumina and YSZ reinforced composites, while fracture toughness improved by 350 and 120%. The 20 and 30 mol% alumina composites exhibited rising R-curve behavior. The increase in elastic modulus was more predominant for alumina containing composites than for YSZ composites. Addition of alumina did not have much effect on the density but addition of YSZ increased the density linearly. Effect of reinforcement on hardness was greater for alumina containing than for YSZ containing composites. The YSZ reinforced glass composites revealed more enhanced viscous behavior than the alumina counterparts at both 800 and 1000°C.