Anomalous oxidation of ferritic interconnects in solid oxide fuel cells

Teruhisa Horita; Haruo Kshimoto; Katsuhiko Yamaji; Natsuko Sakai; Yuping Xiong; Maunel E. Brito; Harumi Yokokawa

doi:10.1016/j.ijhydene.2007.07.058

Anomalous oxidation of ferritic interconnects in solid oxide fuel cells

Teruhisa Horita^*
, Haruo Kshimoto
, Katsuhiko Yamaji
, Natsuko Sakai
, Yuping Xiong
, Maunel E. Brito
, Harumi Yokokawa

^*Corresponding author for this work

National Institute of Advanced Industrial Science and Technology

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

An anomalous oxide scale formed on Fe-Cr alloy interconnects was investigated under operation conditions for solid oxide fuel cells (SOFCs). A dilute CH₄ - H₂ O was flowed one side and air was flowed the other side under constant current flow (0.3 A cm^{- 2}). The Pt-mesh/alloy interface resistance in CH₄ - H₂ O increases with reaction time in a parabolic relationship. The diffusion controlled mechanism was proposed for the Pt-mesh/alloy interfaces with "normal" oxide scale. An "anomalous" thick oxide scale was found near the outer of glass/alloy interfaces, which was exposed to air. The thick oxide scale was composed of Fe-oxide in the outer layer and Cr-oxide in the inner layer (above ± 50 μ m thick from the original level) with SiO₂ and Al₂ O₃ inner oxides. The microstructures and elemental distribution of the anomalous thick oxides were investigated. A possible formation mechanism of the anomalous oxide scale was discussed by considering the reaction with glass components.

Original language	English
Pages (from-to)	3962-3969
Number of pages	8
Journal	International Journal of Hydrogen Energy
Volume	33
Issue number	14
DOIs	https://doi.org/10.1016/j.ijhydene.2007.07.058
State	Published - Jul 2008
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Alloy
Ferritic steel
Metallic interconnects
Oxidation
Oxide scale
Solid oxide fuel cells (SOFCs)

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10.1016/j.ijhydene.2007.07.058

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title = "Anomalous oxidation of ferritic interconnects in solid oxide fuel cells",

abstract = "An anomalous oxide scale formed on Fe-Cr alloy interconnects was investigated under operation conditions for solid oxide fuel cells (SOFCs). A dilute CH4 - H2 O was flowed one side and air was flowed the other side under constant current flow (0.3 A cm- 2). The Pt-mesh/alloy interface resistance in CH4 - H2 O increases with reaction time in a parabolic relationship. The diffusion controlled mechanism was proposed for the Pt-mesh/alloy interfaces with {"}normal{"} oxide scale. An {"}anomalous{"} thick oxide scale was found near the outer of glass/alloy interfaces, which was exposed to air. The thick oxide scale was composed of Fe-oxide in the outer layer and Cr-oxide in the inner layer (above ± 50 μ m thick from the original level) with SiO2 and Al2 O3 inner oxides. The microstructures and elemental distribution of the anomalous thick oxides were investigated. A possible formation mechanism of the anomalous oxide scale was discussed by considering the reaction with glass components.",

keywords = "Alloy, Ferritic steel, Metallic interconnects, Oxidation, Oxide scale, Solid oxide fuel cells (SOFCs)",

author = "Teruhisa Horita and Haruo Kshimoto and Katsuhiko Yamaji and Natsuko Sakai and Yuping Xiong and Brito, \{Maunel E.\} and Harumi Yokokawa",

year = "2008",

month = jul,

doi = "10.1016/j.ijhydene.2007.07.058",

language = "英语",

volume = "33",

pages = "3962--3969",

journal = "International Journal of Hydrogen Energy",

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TY - JOUR

T1 - Anomalous oxidation of ferritic interconnects in solid oxide fuel cells

AU - Horita, Teruhisa

AU - Kshimoto, Haruo

AU - Yamaji, Katsuhiko

AU - Sakai, Natsuko

AU - Xiong, Yuping

AU - Brito, Maunel E.

AU - Yokokawa, Harumi

PY - 2008/7

Y1 - 2008/7

N2 - An anomalous oxide scale formed on Fe-Cr alloy interconnects was investigated under operation conditions for solid oxide fuel cells (SOFCs). A dilute CH4 - H2 O was flowed one side and air was flowed the other side under constant current flow (0.3 A cm- 2). The Pt-mesh/alloy interface resistance in CH4 - H2 O increases with reaction time in a parabolic relationship. The diffusion controlled mechanism was proposed for the Pt-mesh/alloy interfaces with "normal" oxide scale. An "anomalous" thick oxide scale was found near the outer of glass/alloy interfaces, which was exposed to air. The thick oxide scale was composed of Fe-oxide in the outer layer and Cr-oxide in the inner layer (above ± 50 μ m thick from the original level) with SiO2 and Al2 O3 inner oxides. The microstructures and elemental distribution of the anomalous thick oxides were investigated. A possible formation mechanism of the anomalous oxide scale was discussed by considering the reaction with glass components.

AB - An anomalous oxide scale formed on Fe-Cr alloy interconnects was investigated under operation conditions for solid oxide fuel cells (SOFCs). A dilute CH4 - H2 O was flowed one side and air was flowed the other side under constant current flow (0.3 A cm- 2). The Pt-mesh/alloy interface resistance in CH4 - H2 O increases with reaction time in a parabolic relationship. The diffusion controlled mechanism was proposed for the Pt-mesh/alloy interfaces with "normal" oxide scale. An "anomalous" thick oxide scale was found near the outer of glass/alloy interfaces, which was exposed to air. The thick oxide scale was composed of Fe-oxide in the outer layer and Cr-oxide in the inner layer (above ± 50 μ m thick from the original level) with SiO2 and Al2 O3 inner oxides. The microstructures and elemental distribution of the anomalous thick oxides were investigated. A possible formation mechanism of the anomalous oxide scale was discussed by considering the reaction with glass components.

KW - Alloy

KW - Ferritic steel

KW - Metallic interconnects

KW - Oxidation

KW - Oxide scale

KW - Solid oxide fuel cells (SOFCs)

UR - https://www.scopus.com/pages/publications/48949118179

U2 - 10.1016/j.ijhydene.2007.07.058

DO - 10.1016/j.ijhydene.2007.07.058

M3 - 文章

AN - SCOPUS:48949118179

SN - 0360-3199

VL - 33

SP - 3962

EP - 3969

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 14

ER -

Anomalous oxidation of ferritic interconnects in solid oxide fuel cells

Abstract

UN SDGs

Keywords

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