The Discussion of High Temperature Oxidation Behavior of Fe-Cr Based SOFC Interconnector by REP Method
Date Issued
2011
Date
2011
Author(s)
Liu, Yen-ting
Abstract
The SOFC metal interconnector must have excellent oxidation behavior in high temperature and good electrical conductivity, because it operates in high temperature surroundings, but the cost is still high currently. So the thesis use power metallurgy method to manufacture the products, which avoids complicate manufacture process and reduce the cost.
The Fe-Cr-Mn alloy is the common SOFC metal interconnector material, and according to previous research, the addition of Co reinforces the high temperature oxidation behavior, electrical resistance, and thermal expansion. For these advantages, the thesis use Fe-Cr-Mn-Co for the composition of SOFC metal interconnector.
The thesis manufactures alloy powders by REP method, and sinters it for products in next procedure. Finally the products is analyzed by non-continuous 150hr high temperature oxidation, high temperature electrical resistance, and metallographic analysis.
Due to the porous surface, the high temperature oxidation behavior is weaker than expected. To reinforce it, the thesis tries coating LSM film on the surface of the product. The results show that LSM coating improves high temperature oxidation behavior slightly, due to the mismatch of thermal expansion coefficient(CTE) and the porosity of the alloy surface cause the LSM film damaged partly.
Subjects
SOFC
metallic interconnect
rotating electrode process(REP)
high temperature oxidation
surface coating
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-100-R98527022-1.pdf
Size
23.54 KB
Format
Adobe PDF
Checksum
(MD5):d034a3e1a8a59a3d16dea47b1ca0d2d2