Journal of Thermal Spray Technology

, Volume 20, Issue 1, pp 154–159

The Structure and Properties of Plasma Sprayed Iron Oxide Doped Manganese Cobalt Oxide Spinel Coatings for SOFC Metallic Interconnectors

Authors

    • Department of Materials ScienceTampere University of Technology
  • Juha Lagerbom
    • VTT, Research Centre of Finland
  • Leo Hyvärinen
    • Department of Materials ScienceTampere University of Technology
  • Mikko Kylmälahti
    • Department of Materials ScienceTampere University of Technology
  • Olli Himanen
    • VTT, Research Centre of Finland
  • Mikko Pihlatie
    • VTT, Research Centre of Finland
  • Jari Kiviaho
    • VTT, Research Centre of Finland
  • Petri Vuoristo
    • Department of Materials ScienceTampere University of Technology
Peer Reviewed

DOI: 10.1007/s11666-010-9598-5

Cite this article as:
Puranen, J., Lagerbom, J., Hyvärinen, L. et al. J Therm Spray Tech (2011) 20: 154. doi:10.1007/s11666-010-9598-5

Abstract

Manganese cobalt oxide spinel doped with Fe2O3 was studied as a protective coating on ferritic stainless steel interconnects. Chromium alloying causes problems at high operation temperatures in such oxidizing conditions where chromium compounds evaporate and poison the cathode active area, causing the degradation of the solid oxide fuel cell. In order to prevent chromium evaporation, these interconnectors need a protective coating to block the chromium evaporation and to maintain an adequate electrical conductivity. Thermal spraying is regarded as a promising way to produce dense and protective layers. In the present work, the ceramic Mn-Co-Fe oxide spinel coatings were produced by using the atmospheric plasma spray process. Coatings with low thickness and low amount of porosity were produced by optimizing deposition conditions. The original spinel structure decomposed because of the fast transformation of solid-liquid-solid states but was partially restored by using post-annealing treatment.

Keywords

interconnectMn-Co spinelplasma sprayingSOFC

Copyright information

© ASM International 2010