A Mechanistic-Based Healing Model for Self-Healing Glass Seals Used in Solid Oxide Fuel Cells

Journal Article · Sat Sep 01 04:00:00 EDT 2012 · Journal of Power Sources

DOI:https://doi.org/10.1016/j.jpowsour.2012.07.018· OSTI ID:1051192

Xu, Wei; Sun, Xin; Stephens, Elizabeth V; Mastorakos, Ioannis; Khaleel, Mohammad A; Zbib, Hussein M

The usage of self-healing glass as hermetic seals is a recent advancement in sealing technology development for the planar solid oxide fuel cells (SOFCs). Because of its capability of restoring the mechanical properties at elevated temperatures, the self-healing glass seal is expected to provide high reliability in maintaining the long-term structural integrity and functionality of SOFCs. In order to accommodate the design and to evaluate the effectiveness of such engineering seals under various thermo-mechanical operating conditions, computational modeling framework needs to be developed to accurately capture and predict the healing behavior of the glass material. In the present work, a mechanistic-based two-stage model was developed to study the stress and temperature-dependent crack healing of the self-healing glass materials. The model was first calibrated by experimental measurements combined with the kinetic Monte Carlo (kMC) simulation results and then implemented into the finite element analysis (FEA). The effects of various factors, i.e. stress, temperature, crack morphology, on the healing behavior of the glass were investigated and discussed.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1051192
• Report Number(s): PNNL-SA-88448; AA2530000
• Journal Information: Journal of Power Sources, Journal Name: Journal of Power Sources Vol. 218; ISSN JPSODZ; ISSN 0378-7753
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
DESIGN
GLASS
HEALING
KINETICS
MECHANICAL PROPERTIES
MORPHOLOGY
RELIABILITY
SIMULATION
SOLID OXIDE FUEL CELLS
finite element analysis
glass seal
mechanistic model
self-healing
solid oxide fuel cell