In-service degradation of interconnector materials for solid oxide fuel cells

Sanni Mustala; Juha Veivo; Pertti Auerkari; Jari Kiviaho; Matti Noponen

In-service degradation of interconnector materials for solid oxide fuel cells

Sanni Mustala, Juha Veivo, Pertti Auerkari, Jari Kiviaho, Matti Noponen

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Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific

Abstract

The oxide growth and thermal degradation characteristics of three SOFC interconnector alloys have been investigated particularly for the cathode side conditions.The tested materials were ferritic stainless alloys including one common standard grade (alloy 430) and two alloys (Crofer 22 APU, ZMG 232) specifically designed for interconnector service.All three alloys appear to follow parabolic oxidation within the range of testing conditions (up to 500 h at 740 °C in air).A somewhat more pronounced oxidation was found in alloys ZMG 232 and Crofer 22 APU than in alloy 430.During oxidation, a consistent decrease inof iron and increase inof chromium and manganese were observed in the surface oxide.Some chromium transport was detected on the cathode side surface of the cell after 500 h at 740 °C.The results emphasise the importance of an appropriate coating for of the interconnectors, to prevent chromium poisoning on the cathode.A natural coating material would be similar or compatible with the ceramic cathode.Such a coating also has the additional advantage that simpler and cheaper steel grades could be used as the interconnector material.

Original language	English
Title of host publication	Applied Material Research at VTT
Subtitle of host publication	Symposium on Applied Materials
Place of Publication	Espoo
Publisher	VTT Technical Research Centre of Finland
Pages	40-49
ISBN (Electronic)	951-38-6312-3
ISBN (Print)	951-38-6311-5
Publication status	Published - 2006
MoE publication type	B3 Non-refereed article in conference proceedings
Event	Internal Symposium on Applied Materials - Espoo, Finland Duration: 8 Jun 2006 → 8 Jun 2006

Publication series

Series	VTT Symposium
Number	244
ISSN	0357-9387

Conference

Conference	Internal Symposium on Applied Materials
Country	Finland
City	Espoo
Period	8/06/06 → 8/06/06

Access to Document

http://www.vtt.fi/inf/pdf/symposiums/2006/S244.pdf

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Mustala, S., Veivo, J., Auerkari, P., Kiviaho, J., & Noponen, M. (2006). In-service degradation of interconnector materials for solid oxide fuel cells. In Applied Material Research at VTT: Symposium on Applied Materials (pp. 40-49). VTT Technical Research Centre of Finland. VTT Symposium, No. 244 http://www.vtt.fi/inf/pdf/symposiums/2006/S244.pdf

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title = "In-service degradation of interconnector materials for solid oxide fuel cells",

abstract = "The oxide growth and thermal degradation characteristics of three SOFC interconnector alloys have been investigated particularly for the cathode side conditions.The tested materials were ferritic stainless alloys including one common standard grade (alloy 430) and two alloys (Crofer 22 APU, ZMG 232) specifically designed for interconnector service.All three alloys appear to follow parabolic oxidation within the range of testing conditions (up to 500 h at 740 °C in air).A somewhat more pronounced oxidation was found in alloys ZMG 232 and Crofer 22 APU than in alloy 430.During oxidation, a consistent decrease inof iron and increase inof chromium and manganese were observed in the surface oxide.Some chromium transport was detected on the cathode side surface of the cell after 500 h at 740 °C.The results emphasise the importance of an appropriate coating for of the interconnectors, to prevent chromium poisoning on the cathode.A natural coating material would be similar or compatible with the ceramic cathode.Such a coating also has the additional advantage that simpler and cheaper steel grades could be used as the interconnector material.",

author = "Sanni Mustala and Juha Veivo and Pertti Auerkari and Jari Kiviaho and Matti Noponen",

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note = "Internal Symposium on Applied Materials ; Conference date: 08-06-2006 Through 08-06-2006",

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Mustala, S, Veivo, J, Auerkari, P , Kiviaho, J & Noponen, M 2006, In-service degradation of interconnector materials for solid oxide fuel cells. in Applied Material Research at VTT: Symposium on Applied Materials. VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 244, pp. 40-49, Internal Symposium on Applied Materials, Espoo, Finland, 8/06/06. <http://www.vtt.fi/inf/pdf/symposiums/2006/S244.pdf>

In-service degradation of interconnector materials for solid oxide fuel cells. / Mustala, Sanni; Veivo, Juha; Auerkari, Pertti ; Kiviaho, Jari; Noponen, Matti.

Applied Material Research at VTT: Symposium on Applied Materials. Espoo : VTT Technical Research Centre of Finland, 2006. p. 40-49 (VTT Symposium; No. 244).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific

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T1 - In-service degradation of interconnector materials for solid oxide fuel cells

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AU - Veivo, Juha

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AU - Kiviaho, Jari

AU - Noponen, Matti

PY - 2006

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N2 - The oxide growth and thermal degradation characteristics of three SOFC interconnector alloys have been investigated particularly for the cathode side conditions.The tested materials were ferritic stainless alloys including one common standard grade (alloy 430) and two alloys (Crofer 22 APU, ZMG 232) specifically designed for interconnector service.All three alloys appear to follow parabolic oxidation within the range of testing conditions (up to 500 h at 740 °C in air).A somewhat more pronounced oxidation was found in alloys ZMG 232 and Crofer 22 APU than in alloy 430.During oxidation, a consistent decrease inof iron and increase inof chromium and manganese were observed in the surface oxide.Some chromium transport was detected on the cathode side surface of the cell after 500 h at 740 °C.The results emphasise the importance of an appropriate coating for of the interconnectors, to prevent chromium poisoning on the cathode.A natural coating material would be similar or compatible with the ceramic cathode.Such a coating also has the additional advantage that simpler and cheaper steel grades could be used as the interconnector material.

AB - The oxide growth and thermal degradation characteristics of three SOFC interconnector alloys have been investigated particularly for the cathode side conditions.The tested materials were ferritic stainless alloys including one common standard grade (alloy 430) and two alloys (Crofer 22 APU, ZMG 232) specifically designed for interconnector service.All three alloys appear to follow parabolic oxidation within the range of testing conditions (up to 500 h at 740 °C in air).A somewhat more pronounced oxidation was found in alloys ZMG 232 and Crofer 22 APU than in alloy 430.During oxidation, a consistent decrease inof iron and increase inof chromium and manganese were observed in the surface oxide.Some chromium transport was detected on the cathode side surface of the cell after 500 h at 740 °C.The results emphasise the importance of an appropriate coating for of the interconnectors, to prevent chromium poisoning on the cathode.A natural coating material would be similar or compatible with the ceramic cathode.Such a coating also has the additional advantage that simpler and cheaper steel grades could be used as the interconnector material.

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T3 - VTT Symposium

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BT - Applied Material Research at VTT

PB - VTT Technical Research Centre of Finland

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T2 - Internal Symposium on Applied Materials

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