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Fe doped Ni-Co spinel protective coating on ferritic stainless steel for SOFC interconnect application

Jalilvand, G ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijhydene.2013.06.105
  3. Publisher: 2013
  4. Abstract:
  5. In an attempt to reduce the oxidation and Cr evaporation rates, various protective coating layers with a nominal composition of NiCo 2-xFexO4 (x = 0, 0.5, 1) were deposited on the SUS 430 ferritic stainless steel substrate, as interconnect for solid oxide fuel cell application, by sol-gel dip coating method. Then, the coated samples were soaked at 750 C for 2.5 h in N2 and subsequently for 2.5 h in air. Phase composition and microstructure of the coatings were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Moreover, long-term isothermal oxidation experiment and area specific resistance (ASR) measurement were also carried out on the coated samples. Results showed that the addition of 1 mol of Fe into Ni-Co spinel (x = 1), led to a parabolic rate constant of 5.16 × 10-15(g2 cm-4 s-1) and an ASR of 17 mΩ cm2
  6. Keywords:
  7. ASR ; Coating ; Sol-gel ; Area-specific resistances ; Ferritic stainless steel ; Interconnect ; Ni-Co-Fe spinel ; Parabolic rate constants ; SOFC interconnect applications ; Sol-gel dip-coating method ; Coatings ; Ferritic steel ; Oxidation ; Protective coatings ; Scanning electron microscopy ; Sol-gel process ; Sol-gels ; Solid oxide fuel cells (SOFC) ; X ray diffraction ; Nickel
  8. Source: International Journal of Hydrogen Energy ; Volume 38, Issue 27 , 2013 , Pages 12007-12014 ; 03603199 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0360319913016042