Characterization of a new Fe-based alloy as metallic interconnect in SOFC anode environment
Characterization of a new Fe-based alloy as metallic interconnect in SOFC anode environment
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SOFC 阳极环境中作为金属互连的新型铁基合金的表征
DOI：
10.1016/j.ijhydene.2016.09.197
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发表时间：
2016-12
影响因子：
7.2
通讯作者：
Jian Li
中科院分区：
文献类型：
--
作者：
Zhang Wenying;Li Jun;Yang Jie;Zhou Bo;Chi Bo;Pu Jian;Jian Li
在模拟固体氧化物燃料电池（SOFC）阳极环境下，在750℃条件下，研究了低铬合金FeCro作为金属互连材料的抗氧化性能和电接触性能。结果表明，该合金在750℃条件下，在N2+ 4.85% H2+ 3% H2O (g)条件下，氧化时间长达1000 h，具有优异的抗氧化性能。热生长的氧化层由Mn掺杂（Mn, Cr） 3o4尖晶石和cr2o3亚层组成，厚度约为1 μm。氧化动力学服从抛物线规律，速率常数分别为5.23 × 10−14g2cm−4s−1（0 ~ 100 h）和3.85 × 10−15g2cm−4s−1（100 ~ 900 h）。在750℃条件下，在N2+ 3.75% H2+ 25% H2O (g)中暴露581 h后，施加500 mA cm−2的电流下，FeCro合金与Ni网接触的氧化行为与在空气或含有3% H2O (g)的阳极气体中的氧化行为有很大不同。水蒸气的存在促进了内部氧化，形成了具有网状结构的富铁或富铬内部氧化垢。由于Cr供给不足，在包埋金属化合物Ni3Fe的FeCro合金表面形成由fe3o4和FeO组成的富铁外氧化层。虽然在N2+ 3.75% H2+ 25% H2O (g)中，FeCro合金在750°C时腐蚀严重，富铁氧化垢无保护性，但Ni网/FeCro合金的面积比电阻相当低，可以提供足够的金属传导。
The oxidation resistance and electrical contact property of a low-Cr-containing alloy, named as FeCro, was examined as metallic interconnect at 750 °C in simulated solid oxide fuel cell (SOFC) anode environment. This alloy was proved to process excellent oxidation resistance at 750 °C in N2+ 4.85% H2+ 3% H2O (g) for up to 1000 h. The thermally grown oxide scale, around 1 μm thick, consisted of Mn doped (Mn, Cr)3O4spinel with Cr2O3sublayer. The oxidation kinetics obeyed the parabolic law with two rate constants, 5.23 × 10−14g2cm−4s−1(0–100 h) and 3.85 × 10−15g2cm−4s−1(100–900 h) respectively. After 581 h of exposure in N2+ 3.75% H2+ 25% H2O (g) at 750 °C, the oxidation behavior of FeCro alloy in contact with Ni mesh under an applied current of 500 mA cm−2was quite different from that in air or anode gas containing 3% H2O (g). The internal oxidation was promoted in the presence of water vapor, and a Fe- or Cr-rich internal oxide scale with a network structure was formed. Owing to a poor supply of Cr, Fe-rich external oxide scale composed of Fe3O4and FeO was formed on the surface of FeCro alloy in which metallic compound Ni3Fe was embedded. Although FeCro alloy suffered from severe corrosion with non-protective Fe-rich oxide scale at 750 °C in N2+ 3.75% H2+ 25% H2O (g), the area specific resistance of Ni mesh/FeCro alloy was considerably low to offer sufficient metallic conduction.
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DOI：
10.1016/s0921-5093(03)00527-6
发表时间：
2003-11
影响因子：
6.4
作者：
L. Mikkelsen;S. Linderoth
通讯作者：
L. Mikkelsen;S. Linderoth
DOI：
10.1149/1.2729016
发表时间：
2007-05
期刊：
--
影响因子：
--
作者：
Z. Yang;Guanguang Xia;J. Stevenson
通讯作者：
Z. Yang;Guanguang Xia;J. Stevenson
影响因子：
3.9
作者：
Zigui Lu;Jiahong Zhu;E. Andrew Payzant;M. Paranthaman
通讯作者：
Zigui Lu;Jiahong Zhu;E. Andrew Payzant;M. Paranthaman
影响因子：
2.8
作者：
T. Horita;Y. Xiong;K. Yamaji;N. Sakai;H. Yokokawa
通讯作者：
T. Horita;Y. Xiong;K. Yamaji;N. Sakai;H. Yokokawa
影响因子：
5.4
作者：
W. White
通讯作者：
W. White