Effects of alloyed Si on the oxidation behaviour of Co-29Cr-6Mo alloy for solid-oxide fuel cell interconnects

Phacharaphon Tunthawiroon; Yunping Li; Ning Tang; Yuichiro Koizumi; Akihiko Chiba

doi:10.1016/j.corsci.2015.02.036

Effects of alloyed Si on the oxidation behaviour of Co-29Cr-6Mo alloy for solid-oxide fuel cell interconnects

Phacharaphon Tunthawiroon, Yunping Li, Ning Tang, Yuichiro Koizumi, Akihiko Chiba

New Industry Creation Hatchery Center (NICHe)

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

37 Citations (Scopus)

Abstract

To evaluate the suitability of the Co-29Cr-6Mo alloy as an interconnect in solid-oxide fuel cells (SOFCs), the oxidation behaviour of Co-29Cr-6Mo alloys with various Si concentrations was investigated in air at 700-1000°C. The presence of alloyed Si improved the oxide-scale adhesion by promoting the formation of a continuous Cr₂O₃ film. The SiO₂ particles in the inner layer and the grain boundaries of alloy matrix beneath the inner layer inhibited the inward oxygen diffusion and outward chromium diffusion. The results indicate that the Co-29Cr-6Mo alloy with added Si is appropriate for SOFC applications.

Original language	English
Pages (from-to)	88-99
Number of pages	12
Journal	Corrosion Science
Volume	95
DOIs	https://doi.org/10.1016/j.corsci.2015.02.036
Publication status	Published - 2015 Jun 1

Keywords

A. Cobalt
B. SEM
C. Interfaces
C. Oxidation

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10.1016/j.corsci.2015.02.036

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title = "Effects of alloyed Si on the oxidation behaviour of Co-29Cr-6Mo alloy for solid-oxide fuel cell interconnects",

abstract = "To evaluate the suitability of the Co-29Cr-6Mo alloy as an interconnect in solid-oxide fuel cells (SOFCs), the oxidation behaviour of Co-29Cr-6Mo alloys with various Si concentrations was investigated in air at 700-1000°C. The presence of alloyed Si improved the oxide-scale adhesion by promoting the formation of a continuous Cr2O3 film. The SiO2 particles in the inner layer and the grain boundaries of alloy matrix beneath the inner layer inhibited the inward oxygen diffusion and outward chromium diffusion. The results indicate that the Co-29Cr-6Mo alloy with added Si is appropriate for SOFC applications.",

keywords = "A. Cobalt, B. SEM, C. Interfaces, C. Oxidation",

author = "Phacharaphon Tunthawiroon and Yunping Li and Ning Tang and Yuichiro Koizumi and Akihiko Chiba",

note = "Funding Information: This research was partially supported by Program NICHe at Tohoku University, Japan. The author would like to thank Isamu Yoshii, Kimio Waki, Shun Ito, and Issei Narita of IMR, Tohoku University, for contributing to the sample fabrication and preparation, EPMA analysis, and TEM observations. Publisher Copyright: {\textcopyright} 2015 Published by Elsevier Ltd.",

year = "2015",

month = jun,

day = "1",

doi = "10.1016/j.corsci.2015.02.036",

language = "English",

volume = "95",

pages = "88--99",

journal = "Corrosion Science",

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TY - JOUR

T1 - Effects of alloyed Si on the oxidation behaviour of Co-29Cr-6Mo alloy for solid-oxide fuel cell interconnects

AU - Tunthawiroon, Phacharaphon

AU - Li, Yunping

AU - Tang, Ning

AU - Koizumi, Yuichiro

AU - Chiba, Akihiko

N1 - Funding Information: This research was partially supported by Program NICHe at Tohoku University, Japan. The author would like to thank Isamu Yoshii, Kimio Waki, Shun Ito, and Issei Narita of IMR, Tohoku University, for contributing to the sample fabrication and preparation, EPMA analysis, and TEM observations. Publisher Copyright: © 2015 Published by Elsevier Ltd.

PY - 2015/6/1

Y1 - 2015/6/1

N2 - To evaluate the suitability of the Co-29Cr-6Mo alloy as an interconnect in solid-oxide fuel cells (SOFCs), the oxidation behaviour of Co-29Cr-6Mo alloys with various Si concentrations was investigated in air at 700-1000°C. The presence of alloyed Si improved the oxide-scale adhesion by promoting the formation of a continuous Cr2O3 film. The SiO2 particles in the inner layer and the grain boundaries of alloy matrix beneath the inner layer inhibited the inward oxygen diffusion and outward chromium diffusion. The results indicate that the Co-29Cr-6Mo alloy with added Si is appropriate for SOFC applications.

AB - To evaluate the suitability of the Co-29Cr-6Mo alloy as an interconnect in solid-oxide fuel cells (SOFCs), the oxidation behaviour of Co-29Cr-6Mo alloys with various Si concentrations was investigated in air at 700-1000°C. The presence of alloyed Si improved the oxide-scale adhesion by promoting the formation of a continuous Cr2O3 film. The SiO2 particles in the inner layer and the grain boundaries of alloy matrix beneath the inner layer inhibited the inward oxygen diffusion and outward chromium diffusion. The results indicate that the Co-29Cr-6Mo alloy with added Si is appropriate for SOFC applications.

KW - A. Cobalt

KW - B. SEM

KW - C. Interfaces

KW - C. Oxidation

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DO - 10.1016/j.corsci.2015.02.036

M3 - Article

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SN - 0010-938X

VL - 95

SP - 88

EP - 99

JO - Corrosion Science

JF - Corrosion Science

ER -

Effects of alloyed Si on the oxidation behaviour of Co-29Cr-6Mo alloy for solid-oxide fuel cell interconnects

Abstract

Keywords

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