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

doi:10.1299/kikaia.78.523

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 journal › Article › peer-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 language	English
Pages (from-to)	523-530
Number of pages	8
Journal	Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume	78
Issue number	788
DOIs	https://doi.org/10.1299/kikaia.78.523
Publication status	Published - 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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Creep property of cathode materials based on lanthanum manganite in SOFC operating conditions. / Iguchi, Fumitada; Okuda, Tomonori; Kitahara, Hiromichi; Sata, Noriko; Kawada, Tatsuya ; Yugami, Hiroo.

In: Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, Vol. 78, No. 788, 2012, p. 523-530.

Research output: Contribution to journal › Article › peer-review

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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.",

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AU - Kawada, Tatsuya

AU - Yugami, Hiroo

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AB - 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.

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