Formation and structure of plasma sprayed manganese-cobalt spinel coatings on preheated metallic interconnector plates

J. Puranen, Juha Lagerbom, L. Hyvärinen, T. Mäntylä, E. Levänen, M. Kylmälahti, P. Vuoristo

Research output: Contribution to journalArticleScientificpeer-review

24 Citations (Scopus)

Abstract

Manganese-cobalt spinels are promising materials for protective coatings on metallic interconnector plates in solid oxide fuel cells. These protective coatings are used to prevent growth and evaporation of chromium oxide, chromium poisoning and ageing phenomena of the cathode side of the fuel cell. It is well known that chromium trioxide and chromium hydroxide on interconnector plate may easily evaporate at high temperatures and transform back to chromium oxide at the cathodes active area and cause degradation of the solid oxide fuel cell performance. In the present study, plasma spraying together with a substrate pre- and simultaneous heating was found to be an appropriate technique to control the formation and densification of the coating. When plasma spraying Mn-Co spinel powder for cold substrate, high cracking effect inside the splats and in the formed coating was noticed. When applying the molten drops to the substrate heated up to 450 °C amount of cracks in single splats and coatings could be mostly eliminated. The splats stayed in the liquid state longer, which effected for spreading properties and spinel structure could be better preserved by longer crystallize time.

Original languageEnglish
Pages (from-to)1029-1033
Number of pages5
JournalSurface and Coatings Technology
Volume205
Issue number4
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed
Event4th Workshop RIPT (Les Rencontres Internationales sur la Projection Thermique) - Lille, France
Duration: 2 Dec 20094 Dec 2009

Fingerprint

Manganese
Cobalt
spinel
manganese
chromium
Chromium
chromium oxides
cobalt
protective coatings
plasma spraying
Plasma spraying
Protective coatings
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Plasmas
coatings
Coatings
Cathodes
Substrates
cathodes

Keywords

  • Interconnector
  • spinel
  • splat formation
  • plasma spraying
  • ProperPart

Cite this

Puranen, J. ; Lagerbom, Juha ; Hyvärinen, L. ; Mäntylä, T. ; Levänen, E. ; Kylmälahti, M. ; Vuoristo, P. / Formation and structure of plasma sprayed manganese-cobalt spinel coatings on preheated metallic interconnector plates. In: Surface and Coatings Technology. 2010 ; Vol. 205, No. 4. pp. 1029-1033.
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abstract = "Manganese-cobalt spinels are promising materials for protective coatings on metallic interconnector plates in solid oxide fuel cells. These protective coatings are used to prevent growth and evaporation of chromium oxide, chromium poisoning and ageing phenomena of the cathode side of the fuel cell. It is well known that chromium trioxide and chromium hydroxide on interconnector plate may easily evaporate at high temperatures and transform back to chromium oxide at the cathodes active area and cause degradation of the solid oxide fuel cell performance. In the present study, plasma spraying together with a substrate pre- and simultaneous heating was found to be an appropriate technique to control the formation and densification of the coating. When plasma spraying Mn-Co spinel powder for cold substrate, high cracking effect inside the splats and in the formed coating was noticed. When applying the molten drops to the substrate heated up to 450 °C amount of cracks in single splats and coatings could be mostly eliminated. The splats stayed in the liquid state longer, which effected for spreading properties and spinel structure could be better preserved by longer crystallize time.",
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Formation and structure of plasma sprayed manganese-cobalt spinel coatings on preheated metallic interconnector plates. / Puranen, J.; Lagerbom, Juha; Hyvärinen, L.; Mäntylä, T.; Levänen, E.; Kylmälahti, M.; Vuoristo, P.

In: Surface and Coatings Technology, Vol. 205, No. 4, 2010, p. 1029-1033.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Formation and structure of plasma sprayed manganese-cobalt spinel coatings on preheated metallic interconnector plates

AU - Puranen, J.

AU - Lagerbom, Juha

AU - Hyvärinen, L.

AU - Mäntylä, T.

AU - Levänen, E.

AU - Kylmälahti, M.

AU - Vuoristo, P.

PY - 2010

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N2 - Manganese-cobalt spinels are promising materials for protective coatings on metallic interconnector plates in solid oxide fuel cells. These protective coatings are used to prevent growth and evaporation of chromium oxide, chromium poisoning and ageing phenomena of the cathode side of the fuel cell. It is well known that chromium trioxide and chromium hydroxide on interconnector plate may easily evaporate at high temperatures and transform back to chromium oxide at the cathodes active area and cause degradation of the solid oxide fuel cell performance. In the present study, plasma spraying together with a substrate pre- and simultaneous heating was found to be an appropriate technique to control the formation and densification of the coating. When plasma spraying Mn-Co spinel powder for cold substrate, high cracking effect inside the splats and in the formed coating was noticed. When applying the molten drops to the substrate heated up to 450 °C amount of cracks in single splats and coatings could be mostly eliminated. The splats stayed in the liquid state longer, which effected for spreading properties and spinel structure could be better preserved by longer crystallize time.

AB - Manganese-cobalt spinels are promising materials for protective coatings on metallic interconnector plates in solid oxide fuel cells. These protective coatings are used to prevent growth and evaporation of chromium oxide, chromium poisoning and ageing phenomena of the cathode side of the fuel cell. It is well known that chromium trioxide and chromium hydroxide on interconnector plate may easily evaporate at high temperatures and transform back to chromium oxide at the cathodes active area and cause degradation of the solid oxide fuel cell performance. In the present study, plasma spraying together with a substrate pre- and simultaneous heating was found to be an appropriate technique to control the formation and densification of the coating. When plasma spraying Mn-Co spinel powder for cold substrate, high cracking effect inside the splats and in the formed coating was noticed. When applying the molten drops to the substrate heated up to 450 °C amount of cracks in single splats and coatings could be mostly eliminated. The splats stayed in the liquid state longer, which effected for spreading properties and spinel structure could be better preserved by longer crystallize time.

KW - Interconnector

KW - spinel

KW - splat formation

KW - plasma spraying

KW - ProperPart

U2 - 10.1016/j.surfcoat.2010.08.030

DO - 10.1016/j.surfcoat.2010.08.030

M3 - Article

VL - 205

SP - 1029

EP - 1033

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

SN - 0257-8972

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ER -