The Effect of Ferroelasticity of La_<1-x>Sr_xCo_<1-y>Fe_yO_<3-δ> on the Mechanical Stability of Solid Oxide Fuel Cells
The Effect of Ferroelasticity of La_<1-x>Sr_xCo_<1-y>Fe_yO_<3-δ> on the Mechanical Stability of Solid Oxide Fuel Cells
复制标题
La_<1-x>Sr_xCo_<1-y>Fe_yO_<3-δ>铁弹性对固体氧化物燃料电池机械稳定性的影响
DOI：
10.1149/05701.0635ecst
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Tatsuya Kawada
中科院分区：
文献类型：
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作者：
Yuta Kimura;Julian Tolchard;Mari-Ann Einarsrud;Tor Grande;Koji Amezawa;Shin-ichi Hashimoto;Tatsuya Kawada
La0. 6Sr0. 4Co0。2Fe0. 8 O3-δ（LSCF 6428）和La 0. 6Sr0.在室温至1173 K的温度范围内，通过单轴压缩实验对4FeO 3-δ（LSF）进行了评价。在相变温度以下观察到具有残余应变的非线性应力-应变关系，而在相变温度以上观察到没有残余应变的几乎线性关系。循环试验表明，在室温下，第二次循环的滞后宽度比第一次循环的滞后宽度小得多。另一方面，在873 K下几乎没有观察到应力-应变关系和有效柔度的差异。这一结果表明，菱形LSCF的表观杨氏模量取决于所施加的应力和机械历史，由于铁弹性。因此，SOFC中的应力分布可以受到LSCF的铁弹性的影响。
La0. 6Sr0. 4Co0. 2Fe0. 8O3-δ (LSCF6428) and La0. 6Sr0. 4FeO3-δ (LSF) was evaluated by uniaxial compression tests in the temperature range between room temperature and 1173 K. A nonlinear stress-strain relationship with a residual strain was observed below the phase transition temperature, while an almost linear relationship with no residual strain was observed above the phase transition temperature. Cyclic tests revealed that the width of the hysteresis in the 2nd cycle was much smaller compared with that of the 1st cycle at room temperature. On the other hand, the difference in the stressstrain relationship and the effective compliance was hardly observed at 873 K. This result suggests that the apparent Young’s modulus of the rhombohedral LSCF depends on the applied stress and the mechanical history due to ferroelasticity. Thus, the stress distribution in SOFCs can be affected by the ferroelasticity of LSCF.