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Effect of nano-layered ceramic coatings on the electrical conductivity of oxide scale grown on ferritic steels.
- Source :
- Journal of Applied Electrochemistry; Apr2009, Vol. 39 Issue 4, p529-534, 6p, 5 Diagrams, 1 Chart, 1 Graph
- Publication Year :
- 2009
-
Abstract
- The electrical conductivity of a coated and uncoated model Fe-30Cr ferritic steel was studied between 973 and 1,073 K. The ASR values decreased with temperature increase. The application of a nano-structured ceramic coating made of yttria on the surface of the steel induced a decrease of the ASR values, especially at 1,073 K, which is the operating temperature for Intermediate Temperature Solid-Oxide Fuel Cells. The ASR value of the yttria-coated alloy is 9.3 mΩ cm<superscript>2</superscript> compared to 37.8 mΩ cm<superscript>2</superscript> determined on the uncoated steel after 100 h at 1,073 K in air. The estimated value of the ASR parameter after 10,000 h is encouraging, as it is limited to 17 mΩ cm<superscript>2</superscript>. The oxidised surfaces were characterised by scanning electron microscopy and X-ray diffraction. The results were compared with the literature. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0021891X
- Volume :
- 39
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Journal of Applied Electrochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 36894046
- Full Text :
- https://doi.org/10.1007/s10800-008-9726-9