Thermomechanical Properties of Cycled Ceramic/Glass Composite Seals for Solid Oxide Fuel Cells

Abstract

The present research focuses on a novel ceramic/glass composite seal. These seals firstunderwent a curing cycle. The cycled seal was then characterized with a laser dilatome-ter to identify the glass transition, softening temperature, and thermal expansion proper-ties. High temperature ring-on-ring (RoR) experiments were performed to study the effectof glass transition and softening temperatures on mechanical response. X-ray diffraction(XRD) techniques in conjunction with post-test micrographs were used to understand theobserved mechanical response. In addition, Weibull statistical analysis performed oncycled seals showed that Weibull modulus had decreased and Weibull characteristicsstrength had increased with multiple thermal cycles. [DOI: 10.1115/1.4029876]Keywords: solid oxide fuel cell (SOFC), ceramic/glass seals, glass transition tempera-ture, biaxial flexural strength, Weibull parameters