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Electrophoretic Deposition of (Mn,Co)3O4 Spinel Coating for Solid Oxide Fuel Cell Interconnects

Mirzaei, Mohamad Mahdi | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45416 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science & Engineering
  6. Advisor(s): Faghihi Sani, Mohammad Ali; Simchi, Abdol Reza
  7. Abstract:
  8. Solid oxide fuel cell (SOFC) is one of the promising candidates for clean energy production. Due to the high operating temperature of SOFC, a protective coating is commonly applied on the surface of interconnects to prevent oxidation. In this study, electrophoretic deposition was employed to prepare a manganese-cobalt spinel coating on the surface of ferritic stainless steel (AISISAE430) substrates. MnCo2O4 powder with an average particle size of 60 nm was utilized and the sintering behavior of the coatings at different temperatures was studied. Non-isothermal and isothermal sintering behavior of the powder compacts were examined by employing a sensitive dilatometer. Master sintering curve of the powder compacts was also established. The activation energy of sintering was determined 513±13 kJmol-1. Three different sintering aids including nickel(II) nitrate, iron(II) nitrate, and cobalt(II) nitrate were also used to enhance the densification. It was found that the addition of nickel(II) nitrate was more effective on the consolidation process. Finally, the oxidation behavior and electrical properties of the prepared specimens were studied. Improved oxidation resistance and better electrical conductivity of the stainless steel substrate were attained in the presence of the MnCo2O4 protective coating
  9. Keywords:
  10. Sintering ; Solid Oxide Fuel Cell (SOFC) ; Electrophoretic Deposition ; Spinel ; Interconnect ; Stainless Steel

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