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Mechanical durability of solid oxide fuel cell glass-ceramic sealant/steel interconnect joint under thermo-mechanical cycling

Author

Listed:
  • Lin, Chih-Kuang
  • Chen, Kun-Yi
  • Wu, Si-Han
  • Shiu, Wei-Hong
  • Liu, Chien-Kuo
  • Lee, Ruey-Yi

Abstract

A testing method is developed to quantitatively determine the thermo-mechanical cycling life in oxidizing atmosphere for the joint between a solid oxide fuel cell glass-ceramic sealant and a ferritic stainless steel interconnect. Thermo-mechanical cycling tests are performed under cyclic shear or tensile loading in conjunction with cyclic temperature variance between 40 °C and 800 °C. Results reveal thermo-mechanical cycling life under both shear and tensile loadings increases with a decrease in end stress at 800 °C, for a certain end stress at 40 °C. Nevertheless, for a certain end stress at 800 °C, the tensile thermo-mechanical cycling life increases with a decrease in end stress at 40 °C, while the shear thermo-mechanical cycling life is independent of end stress at 40 °C. A difference in fracture pattern is also observed between shear and tensile loadings. For shear loading, fracture mainly takes place along the interface between glass-ceramic sealant and an oxide layer, such as BaCrO4 or Cr2O3. However, for tensile loading, fracture mainly occurs within the glass-ceramic layer, following crack initiation at the interface of Cr2O3/sealant or Cr2O3/BaCrO4.

Suggested Citation

  • Lin, Chih-Kuang & Chen, Kun-Yi & Wu, Si-Han & Shiu, Wei-Hong & Liu, Chien-Kuo & Lee, Ruey-Yi, 2019. "Mechanical durability of solid oxide fuel cell glass-ceramic sealant/steel interconnect joint under thermo-mechanical cycling," Renewable Energy, Elsevier, vol. 138(C), pages 1205-1213.
    • Handle: RePEc:eee:renene:v:138:y:2019:i:c:p:1205-1213
    DOI: 10.1016/j.renene.2019.02.041
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    Cited by:

    1. Kistner, Lukas & Bensmann, Astrid & Hanke-Rauschenbach, Richard, 2022. "Optimal Design of a Distributed Ship Power System with Solid Oxide Fuel Cells under the Consideration of Component Malfunctions," Applied Energy, Elsevier, vol. 316(C).

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