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Compatibility of perovskite contact layers between cathode and metallic interconnector plates of SOFCs

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Title Compatibility of perovskite contact layers between cathode and metallic interconnector plates of SOFCs
 
Creator QUADAKKERS, WJ
GREINER, H
HANSEL, M
PATTANAIK, A
KHANNA, AS
MALLENER, W
 
Subject thermal-expansion coefficient
oxide fuel-cell
electrical-conductivity
seebeck coefficient
separator
alloys
ni
solid oxide fuel cells
interconnector plates
interface scales
cathode-interconnector contact
 
Description From the viewpoint of corrosion resistance alumina and chromia forming alloys are potential candidate materials for SOFC interconnector plates. However, at the SOFC operating temperatures of around 950 degrees C the first-mentioned alloy type tends to form electrically insulating oxide scale at the interfaces between the interconnector and the ceramic contact layer, the interface oxide consisting of Al2O3 and M(2)O(3+/-x)-nAl(2)O(3). Chromium-based oxide dispersion strengthened (ODS) alloys are more suitable for SOFC applications because the chromia-based scale forming at the interfaces with the contact layers has much higher electronic conductivity than the alumina-based scale. However, upon high-temperature exposure, the composition of the ceramic contact layers is significantly changed due to solid state and vapour phase chromium transport from the alloy into the contact layer, Coatings might be necessary to prevent this degradation mechanism.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-24T13:53:06Z
2011-12-26T12:56:47Z
2011-12-27T05:46:01Z
2011-07-24T13:53:06Z
2011-12-26T12:56:47Z
2011-12-27T05:46:01Z
1996
 
Type Article
 
Identifier SOLID STATE IONICS, 91(1-2), 55-67
0167-2738
http://dx.doi.org/10.1016/S0167-2738(96)00425-0
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6443
http://hdl.handle.net/10054/6443
 
Language en