Creep rupture of the joint between a glass-ceramic sealant and lanthanum strontium manganite-coated ferritic stainless steel interconnect for solid oxide fuel cells

Chih Kuang Lin, Ting Wei Lin, Si Han Wu, Wei Hong Shiu, Chien Kuo Liu, Ruey Yi Lee

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Creep rupture is investigated at 800 °C of a joint between a glass-ceramic sealant and a ferritic stainless steel interconnect coated with lanthanum strontium manganite for solid oxide fuel cell application. Results reveal the shear and tensile creep strength of the as-joined, non-aged joint at a rupture time of 1000 h is about 42% and 3% of the average shear and tensile bonding strength, respectively. A thermal aging of 1000 h at 800 °C enhances the creep strength. For both non-aged shear and tensile specimens with a short creep rupture time, fracture mainly takes place in an oxyapatite interlayer which is formed in the joining process. For a medium creep rupture time, fracture site changes to a mixed BaCrO4/oxyapatite layer. Oxyapatite and BaCrO4 dominate the creep failure mechanism for 1000 h-aged shear specimens, while (Cr,Mn)3O4 spinel plays a role in the creep failure of 1000 h-aged tensile specimens.

Original languageEnglish
Pages (from-to)2417-2429
Number of pages13
JournalJournal of the European Ceramic Society
Volume38
Issue number5
DOIs
StatePublished - May 2018

Keywords

  • Creep
  • Glass-ceramic sealant
  • Interconnect
  • Joint
  • Solid oxide fuel cell

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