METAL INTERCONNECTS FOR SOLID OXIDE FUEL CELL POWER SYSTEMS

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Description

Interconnect development is identified by the U.S. Department of Energy as a key technical area requiring focused research to meet the performance and cost goals under the Solid State Energy Conversion Alliance initiative. In the Phase I SECA Core Technology Program, Ceramatec investigated a commercial ferritic stainless steel composition for oxidation resistance properties by measuring the weight gain when exposed to air at the fuel cell operating temperature. A pre-treatment process that results in a dense, adherent scale was found to reduce the oxide scale growth rate significantly. A process for coating the surface of the alloy in order to ... continued below

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27 pages

Creation Information

Elangovan, S.; Balagopal, S.; Timper, M.; Bay, I.; Larsen, D. & Hartvigsen, J. October 1, 2003.

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Description

Interconnect development is identified by the U.S. Department of Energy as a key technical area requiring focused research to meet the performance and cost goals under the Solid State Energy Conversion Alliance initiative. In the Phase I SECA Core Technology Program, Ceramatec investigated a commercial ferritic stainless steel composition for oxidation resistance properties by measuring the weight gain when exposed to air at the fuel cell operating temperature. A pre-treatment process that results in a dense, adherent scale was found to reduce the oxide scale growth rate significantly. A process for coating the surface of the alloy in order to reduce the in-plane resistance and potentially inhibit chromium oxide evaporation was also identified. The combination of treatments provided a very low resistance through the scale. The resistance measured was as low as 10 milliohm-cm{sup 2} at 750 C in air. The oxide scale was found to be stable in humidified air at 750 C. The resistance value was stable over several thermal cycles. A similar treatment and coating for the fuel side of the interconnect also showed an exceptionally low resistance of one milliohm-cm{sup 2} in humidified hydrogen at 750 C, and was stable through multiple thermal cycles. Analysis of the scale after exposure to various atmospheres showed the presence of a stable composition. When exposed to a dual (air and hydrogen) atmosphere however, the scale composition contains a mixture of phases. Based on results to-date, the alloy selection and the treatment processes appear to be well suited for SOFC interconnect application.

Physical Description

27 pages

Notes

OSTI as DE00833893

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  • Other Information: PBD: 1 Oct 2003

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  • Report No.: NONE
  • Grant Number: FC26-02NT41569
  • DOI: 10.2172/833893 | External Link
  • Office of Scientific & Technical Information Report Number: 833893
  • Archival Resource Key: ark:/67531/metadc787402

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • October 1, 2003

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • Jan. 3, 2017, 4:51 p.m.

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Elangovan, S.; Balagopal, S.; Timper, M.; Bay, I.; Larsen, D. & Hartvigsen, J. METAL INTERCONNECTS FOR SOLID OXIDE FUEL CELL POWER SYSTEMS, report, October 1, 2003; United States. (digital.library.unt.edu/ark:/67531/metadc787402/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.