Interdiffusion between Co3O4 coating and the oxide scale of Fe-22Cr alloy

Anette Nørgaard Hansson; Peter B. Friehling; Søren Linderoth; Marcel A.J. Somers

Interdiffusion between Co3O4 coating and the oxide scale of Fe-22Cr alloy

Anette Nørgaard Hansson
, Peter B. Friehling
, Søren Linderoth
, Marcel A.J. Somers

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

In solid oxide fuels cell stacks, the Fe-Cr interconnector plates and their oxidation scale formed during operation must have sufficiently high electrical conductivity at the operating temperature. It is anticipated that this can be achieved by reaction-diffusion between Co3O4 and the chromia scale on Fe-Cr alloys. Coatings of Co3O4 were deposited on a Fe-22Cr alloy by plasma spraying and spray-painting. As-deposited samples were oxidised in air containing 1% H2O at 900C for various exposure time. During exposure the Fe-22Cr alloy forms an oxide scale, which reacts with the coating. The effects of inter-diffusion between the oxide scale and the Co3O4 coating were investigated with X-ray diffraction, scanning electron microscopy and energy-dispersive spectroscopy. The results obtained are discussed in relation to a calculated Cr-Co-oxide phase diagrams.

Original language	English
Title of host publication	Mass and charge transport in inorganic materials-II
Publisher	Techna Srl
Publication date	2002
Publication status	Published - 2002
Event	Mass and charge transport in inorganic materials - Firenze Duration: 5 Nov 1829 → …

Conference

Conference	Mass and charge transport in inorganic materials
City	Firenze
Period	05/11/1829 → …

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@inproceedings{a999de0cf7824b13b67a25d94b81dcaa,

title = "Interdiffusion between Co3O4 coating and the oxide scale of Fe-22Cr alloy",

abstract = "In solid oxide fuels cell stacks, the Fe-Cr interconnector plates and their oxidation scale formed during operation must have sufficiently high electrical conductivity at the operating temperature. It is anticipated that this can be achieved by reaction-diffusion between Co3O4 and the chromia scale on Fe-Cr alloys. Coatings of Co3O4 were deposited on a Fe-22Cr alloy by plasma spraying and spray-painting. As-deposited samples were oxidised in air containing 1\% H2O at 900C for various exposure time. During exposure the Fe-22Cr alloy forms an oxide scale, which reacts with the coating. The effects of inter-diffusion between the oxide scale and the Co3O4 coating were investigated with X-ray diffraction, scanning electron microscopy and energy-dispersive spectroscopy. The results obtained are discussed in relation to a calculated Cr-Co-oxide phase diagrams.",

keywords = "Materials technology",

author = "Hansson, \{Anette N{\o}rgaard\} and Friehling, \{Peter B.\} and S{\o}ren Linderoth and Somers, \{Marcel A.J.\}",

year = "2002",

language = "English",

booktitle = "Mass and charge transport in inorganic materials-II",

publisher = "Techna Srl",

note = "Mass and charge transport in inorganic materials ; Conference date: 05-11-1829",

}

TY - GEN

T1 - Interdiffusion between Co3O4 coating and the oxide scale of Fe-22Cr alloy

AU - Hansson, Anette Nørgaard

AU - Friehling, Peter B.

AU - Linderoth, Søren

AU - Somers, Marcel A.J.

PY - 2002

Y1 - 2002

N2 - In solid oxide fuels cell stacks, the Fe-Cr interconnector plates and their oxidation scale formed during operation must have sufficiently high electrical conductivity at the operating temperature. It is anticipated that this can be achieved by reaction-diffusion between Co3O4 and the chromia scale on Fe-Cr alloys. Coatings of Co3O4 were deposited on a Fe-22Cr alloy by plasma spraying and spray-painting. As-deposited samples were oxidised in air containing 1% H2O at 900C for various exposure time. During exposure the Fe-22Cr alloy forms an oxide scale, which reacts with the coating. The effects of inter-diffusion between the oxide scale and the Co3O4 coating were investigated with X-ray diffraction, scanning electron microscopy and energy-dispersive spectroscopy. The results obtained are discussed in relation to a calculated Cr-Co-oxide phase diagrams.

AB - In solid oxide fuels cell stacks, the Fe-Cr interconnector plates and their oxidation scale formed during operation must have sufficiently high electrical conductivity at the operating temperature. It is anticipated that this can be achieved by reaction-diffusion between Co3O4 and the chromia scale on Fe-Cr alloys. Coatings of Co3O4 were deposited on a Fe-22Cr alloy by plasma spraying and spray-painting. As-deposited samples were oxidised in air containing 1% H2O at 900C for various exposure time. During exposure the Fe-22Cr alloy forms an oxide scale, which reacts with the coating. The effects of inter-diffusion between the oxide scale and the Co3O4 coating were investigated with X-ray diffraction, scanning electron microscopy and energy-dispersive spectroscopy. The results obtained are discussed in relation to a calculated Cr-Co-oxide phase diagrams.

KW - Materials technology

M3 - Article in proceedings

BT - Mass and charge transport in inorganic materials-II

PB - Techna Srl

T2 - Mass and charge transport in inorganic materials

Y2 - 5 November 1829

ER -

Interdiffusion between Co3O4 coating and the oxide scale of Fe-22Cr alloy

Abstract

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