Experimental study of aging induced damage and self-healing behavior of glass/ceramic sealant used in SOFC

W. N. Liu, X. Sun, B. Koeppel, M. Khaleel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

High operating temperature of solid oxide fuel cells require that sealant must function at high temperature between 600° and 900°C and in the oxidizing and reducing environments of fuel and air. In this paper, experiment tests were implemented to investigate the aging dependent volume fraction of ceramic phases, aging induced micro-damage, and self-healing behavior of the glass ceramic sealant used in solid oxide fuel cells (SOFCs). With longer heat treatment or aging time during operation, further crystallization may reduce the residual glass content while boosting the ceramic crystalline content. Meanwhile, the micro-damage was induced by the cooling down process from the operating temperature to the room temperature, which can potentially degrade the mechanical properties of the glass/ceramic sealant. Upon reheating to the SOFC operating temperature, the glass/ceramic sealant exhibits the possible self-healing characterization, which can restore the mechanical performance of the glass/ceramic sealant.

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition, MS and T'08
Pages380-389
Number of pages10
Volume1
Publication statusPublished - 1 Dec 2008
Externally publishedYes
EventMaterials Science and Technology Conference and Exhibition, MS and T'08 - Pittsburgh, PA, United States
Duration: 5 Oct 20089 Oct 2008

Other

OtherMaterials Science and Technology Conference and Exhibition, MS and T'08
CountryUnited States
CityPittsburgh, PA
Period5/10/089/10/08

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Keywords

  • Aging
  • Glass/ceramic sealant
  • Micro-voids
  • Self-healing
  • SOFC

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials

Cite this

Liu, W. N., Sun, X., Koeppel, B., & Khaleel, M. (2008). Experimental study of aging induced damage and self-healing behavior of glass/ceramic sealant used in SOFC. In Materials Science and Technology Conference and Exhibition, MS and T'08 (Vol. 1, pp. 380-389)