TY - JOUR
T1 - Creep property of cathode materials based on lanthanum manganite in SOFC operating conditions
AU - Iguchi, Fumitada
AU - Okuda, Tomonori
AU - Kitahara, Hiromichi
AU - Sata, Noriko
AU - Kawada, Tatsuya
AU - Yugami, Hiroo
PY - 2012
Y1 - 2012
N2 - 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.
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.
KW - Ceramics(0060)
KW - Creep(0029)
KW - Porous Material(0162)
KW - Solid Oxide Fuel Cell(0527)
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U2 - 10.1299/kikaia.78.523
DO - 10.1299/kikaia.78.523
M3 - Article
AN - SCOPUS:84861603253
SN - 0387-5008
VL - 78
SP - 523
EP - 530
JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
JF - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
IS - 788
ER -