Post-mortem evaluation of oxidized atmospheric plasma sprayed Mn-Co-Fe oxide spinel coatings on SOFC interconnectors

J. Puranen (Corresponding Author), Mikko Pihlatie, Juha Lagerbom, G. Bolelli, J. Laakso, L. Hyvärinen, M. Kylmälahti, Olli Himanen, Jari Kiviaho, L. Lusvarghi, P. Vuoristo

Research output: Contribution to journalArticleScientificpeer-review

24 Citations (Scopus)

Abstract

Interconnects employed in solid oxide fuel cells require electrically conductive protective coatings such as those based on manganese cobalt oxide spinels in order to prevent evaporation of volatile Cr(VI)-compounds and to minimize high temperature corrosion. MnCo2-xFexO4 based (where x = 0.1 and 0.3) oxide spinel protective coatings were manufactured by the atmospheric plasma spraying process on Crofer 22 APU substrates. The coated substrates were oxidized at 700 °C in air for 1000 h and post-mortem analyses were conducted to study the performance of the thermal sprayed coatings. During the high temperature oxidation, a four-point on-line measurement technique was used for area specific resistance studies. The MnCo1.7Fe0.3O4 coating was tested together with the La0.85Sr0.15Mn1.1O3-spacer. The atmospheric plasma sprayed MnCo2-xFexO4 showed excellent Cr-barrier properties and decreased oxidation of the substrate. In addition, resistance as low as 9.20 m{\Omega} cm2 values was obtained after the 1000 h oxidation cycle. The MnCo1.9Fe0.1O4 coating manufactured by the atmospheric plasma spraying process is a promising candidate for SOFC interconnect applications.
Original languageEnglish
Pages (from-to)17284-17294
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number30
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Fingerprint

Solid oxide fuel cells (SOFC)
spinel
protective coatings
plasma spraying
Plasma spraying
Protective coatings
Plasmas
coatings
Coatings
oxidation
Oxides
oxides
evaluation
Substrates
Oxidation
cobalt oxides
sprayed coatings
Sprayed coatings
Thermooxidation
manganese oxides

Keywords

  • solid oxide fuel cells
  • SOFC interconnect
  • atmospheric plasma spraying
  • spinel coatings
  • protective coatings
  • area specific resistance
  • ProperPart

Cite this

Puranen, J. ; Pihlatie, Mikko ; Lagerbom, Juha ; Bolelli, G. ; Laakso, J. ; Hyvärinen, L. ; Kylmälahti, M. ; Himanen, Olli ; Kiviaho, Jari ; Lusvarghi, L. ; Vuoristo, P. / Post-mortem evaluation of oxidized atmospheric plasma sprayed Mn-Co-Fe oxide spinel coatings on SOFC interconnectors. In: International Journal of Hydrogen Energy. 2014 ; Vol. 39, No. 30. pp. 17284-17294.
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title = "Post-mortem evaluation of oxidized atmospheric plasma sprayed Mn-Co-Fe oxide spinel coatings on SOFC interconnectors",
abstract = "Interconnects employed in solid oxide fuel cells require electrically conductive protective coatings such as those based on manganese cobalt oxide spinels in order to prevent evaporation of volatile Cr(VI)-compounds and to minimize high temperature corrosion. MnCo2-xFexO4 based (where x = 0.1 and 0.3) oxide spinel protective coatings were manufactured by the atmospheric plasma spraying process on Crofer 22 APU substrates. The coated substrates were oxidized at 700 °C in air for 1000 h and post-mortem analyses were conducted to study the performance of the thermal sprayed coatings. During the high temperature oxidation, a four-point on-line measurement technique was used for area specific resistance studies. The MnCo1.7Fe0.3O4 coating was tested together with the La0.85Sr0.15Mn1.1O3-spacer. The atmospheric plasma sprayed MnCo2-xFexO4 showed excellent Cr-barrier properties and decreased oxidation of the substrate. In addition, resistance as low as 9.20 m{\Omega} cm2 values was obtained after the 1000 h oxidation cycle. The MnCo1.9Fe0.1O4 coating manufactured by the atmospheric plasma spraying process is a promising candidate for SOFC interconnect applications.",
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author = "J. Puranen and Mikko Pihlatie and Juha Lagerbom and G. Bolelli and J. Laakso and L. Hyv{\"a}rinen and M. Kylm{\"a}lahti and Olli Himanen and Jari Kiviaho and L. Lusvarghi and P. Vuoristo",
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Post-mortem evaluation of oxidized atmospheric plasma sprayed Mn-Co-Fe oxide spinel coatings on SOFC interconnectors. / Puranen, J. (Corresponding Author); Pihlatie, Mikko; Lagerbom, Juha; Bolelli, G.; Laakso, J.; Hyvärinen, L.; Kylmälahti, M.; Himanen, Olli; Kiviaho, Jari; Lusvarghi, L.; Vuoristo, P.

In: International Journal of Hydrogen Energy, Vol. 39, No. 30, 2014, p. 17284-17294.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Post-mortem evaluation of oxidized atmospheric plasma sprayed Mn-Co-Fe oxide spinel coatings on SOFC interconnectors

AU - Puranen, J.

AU - Pihlatie, Mikko

AU - Lagerbom, Juha

AU - Bolelli, G.

AU - Laakso, J.

AU - Hyvärinen, L.

AU - Kylmälahti, M.

AU - Himanen, Olli

AU - Kiviaho, Jari

AU - Lusvarghi, L.

AU - Vuoristo, P.

PY - 2014

Y1 - 2014

N2 - Interconnects employed in solid oxide fuel cells require electrically conductive protective coatings such as those based on manganese cobalt oxide spinels in order to prevent evaporation of volatile Cr(VI)-compounds and to minimize high temperature corrosion. MnCo2-xFexO4 based (where x = 0.1 and 0.3) oxide spinel protective coatings were manufactured by the atmospheric plasma spraying process on Crofer 22 APU substrates. The coated substrates were oxidized at 700 °C in air for 1000 h and post-mortem analyses were conducted to study the performance of the thermal sprayed coatings. During the high temperature oxidation, a four-point on-line measurement technique was used for area specific resistance studies. The MnCo1.7Fe0.3O4 coating was tested together with the La0.85Sr0.15Mn1.1O3-spacer. The atmospheric plasma sprayed MnCo2-xFexO4 showed excellent Cr-barrier properties and decreased oxidation of the substrate. In addition, resistance as low as 9.20 m{\Omega} cm2 values was obtained after the 1000 h oxidation cycle. The MnCo1.9Fe0.1O4 coating manufactured by the atmospheric plasma spraying process is a promising candidate for SOFC interconnect applications.

AB - Interconnects employed in solid oxide fuel cells require electrically conductive protective coatings such as those based on manganese cobalt oxide spinels in order to prevent evaporation of volatile Cr(VI)-compounds and to minimize high temperature corrosion. MnCo2-xFexO4 based (where x = 0.1 and 0.3) oxide spinel protective coatings were manufactured by the atmospheric plasma spraying process on Crofer 22 APU substrates. The coated substrates were oxidized at 700 °C in air for 1000 h and post-mortem analyses were conducted to study the performance of the thermal sprayed coatings. During the high temperature oxidation, a four-point on-line measurement technique was used for area specific resistance studies. The MnCo1.7Fe0.3O4 coating was tested together with the La0.85Sr0.15Mn1.1O3-spacer. The atmospheric plasma sprayed MnCo2-xFexO4 showed excellent Cr-barrier properties and decreased oxidation of the substrate. In addition, resistance as low as 9.20 m{\Omega} cm2 values was obtained after the 1000 h oxidation cycle. The MnCo1.9Fe0.1O4 coating manufactured by the atmospheric plasma spraying process is a promising candidate for SOFC interconnect applications.

KW - solid oxide fuel cells

KW - SOFC interconnect

KW - atmospheric plasma spraying

KW - spinel coatings

KW - protective coatings

KW - area specific resistance

KW - ProperPart

U2 - 10.1016/j.ijhydene.2014.08.105

DO - 10.1016/j.ijhydene.2014.08.105

M3 - Article

VL - 39

SP - 17284

EP - 17294

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 30

ER -