Creep property of cathode materials based on lanthanum manganite in SOFC operating conditions

Fumitada Iguchi, Tomonori Okuda, Hiromichi Kitahara, Noriko Sata, Tatsuya Kawada, Hiroo Yugami

Research output: Contribution to journalArticlepeer-review

Abstract

Creep properties of strontium doped lanthanum manganite (LSM) were studied in SOFC operating conditions, i.e. in the temperature range of 800 °C to 1050 °C and in air and argon gas environment. Although the difference of atmosphere did not affect creep properties, temperature and applied stress dependence of steady-state creep rate changed around 900 °C. Considering previous reports, it was concluded that dominant creep mechanism of LSM in the temperature range of 950 °C to 1300 °C was diffusion creep and the dominant creep mechanism changed at the temperature lower than 9OO°C. This indicated that dominant creep mechanism was grain boundary sliding creep. Because grain boundary sliding creep showed higher stress dependence and lower temperature dependence than diffusion creep, creep deformation during SOFC operation will be larger than expectations based on diffusion creep.

Original languageEnglish
Pages (from-to)523-530
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume78
Issue number788
DOIs
Publication statusPublished - 2012

Keywords

  • Ceramics(0060)
  • Creep(0029)
  • Porous Material(0162)
  • Solid Oxide Fuel Cell(0527)

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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