Effects of Si and Al concentrations in Fe-Cr alloy on the formation of oxide scales in H2-H2O

Teruhisa Horita; Katsuhiko Yamaji; Harumi Yokokawa; Akihiro Toji; Toshihiro Uehara; Kei Ogasawara; Harukuni Kameda; Yoshio Matsuzaki; Satoshi Yamashita

doi:10.1016/j.ijhydene.2008.07.118

Effects of Si and Al concentrations in Fe-Cr alloy on the formation of oxide scales in H₂-H₂O

Teruhisa Horita, Katsuhiko Yamaji, Harumi Yokokawa, Akihiro Toji, Toshihiro Uehara, Kei Ogasawara, Harukuni Kameda, Yoshio Matsuzaki, Satoshi Yamashita

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

34 Citations (Scopus)

Abstract

Effects of silicon and aluminum concentrations in Fe-Cr alloys on the formation of oxide scales were examined in H₂-H₂O atmosphere for interconnects of solid oxide fuel cells (SOFCs), The morphology and oxide scale growth rates were compared between conventional and modified Fe-Cr alloys (Si and Al concentration reduced). The formed oxide scales were characterized by surface and depth profile analyses. Oxide scales were composed of the following oxide phases from surface to inner oxide scale: Mn-Cr-(Fe) spinel, Cr₂O₃, Si-rich interface, and Al₂O ₃ internal oxide. Although the scale formation mechanism is similar between conventional and modified alloys, the oxide scale growth rates were decreased in the modified Fe-Cr alloy. The electrical conductivity of oxidized Fe-Cr alloys was improved in the modified Fe-Cr alloy due to thinner oxide scale thickness and complete Cr₂O₃ film with less distribution of insulating Si and Al internal oxides.

Original language	English
Pages (from-to)	6308-6315
Number of pages	8
Journal	International Journal of Hydrogen Energy
Volume	33
Issue number	21
DOIs	https://doi.org/10.1016/j.ijhydene.2008.07.118
Publication status	Published - Nov 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

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

Access to Document

10.1016/j.ijhydene.2008.07.118

Cite this

@article{f38f9b168c014dc3b8d74c6038f1c985,

title = "Effects of Si and Al concentrations in Fe-Cr alloy on the formation of oxide scales in H2-H2O",

abstract = "Effects of silicon and aluminum concentrations in Fe-Cr alloys on the formation of oxide scales were examined in H2-H2O atmosphere for interconnects of solid oxide fuel cells (SOFCs), The morphology and oxide scale growth rates were compared between conventional and modified Fe-Cr alloys (Si and Al concentration reduced). The formed oxide scales were characterized by surface and depth profile analyses. Oxide scales were composed of the following oxide phases from surface to inner oxide scale: Mn-Cr-(Fe) spinel, Cr2O3, Si-rich interface, and Al2O 3 internal oxide. Although the scale formation mechanism is similar between conventional and modified alloys, the oxide scale growth rates were decreased in the modified Fe-Cr alloy. The electrical conductivity of oxidized Fe-Cr alloys was improved in the modified Fe-Cr alloy due to thinner oxide scale thickness and complete Cr2O3 film with less distribution of insulating Si and Al internal oxides.",

author = "Teruhisa Horita and Katsuhiko Yamaji and Harumi Yokokawa and Akihiro Toji and Toshihiro Uehara and Kei Ogasawara and Harukuni Kameda and Yoshio Matsuzaki and Satoshi Yamashita",

year = "2008",

month = nov,

doi = "10.1016/j.ijhydene.2008.07.118",

language = "English",

volume = "33",

pages = "6308--6315",

journal = "International Journal of Hydrogen Energy",

issn = "0360-3199",

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}

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T1 - Effects of Si and Al concentrations in Fe-Cr alloy on the formation of oxide scales in H2-H2O

AU - Horita, Teruhisa

AU - Yamaji, Katsuhiko

AU - Yokokawa, Harumi

AU - Toji, Akihiro

AU - Uehara, Toshihiro

AU - Ogasawara, Kei

AU - Kameda, Harukuni

AU - Matsuzaki, Yoshio

AU - Yamashita, Satoshi

PY - 2008/11

Y1 - 2008/11

N2 - Effects of silicon and aluminum concentrations in Fe-Cr alloys on the formation of oxide scales were examined in H2-H2O atmosphere for interconnects of solid oxide fuel cells (SOFCs), The morphology and oxide scale growth rates were compared between conventional and modified Fe-Cr alloys (Si and Al concentration reduced). The formed oxide scales were characterized by surface and depth profile analyses. Oxide scales were composed of the following oxide phases from surface to inner oxide scale: Mn-Cr-(Fe) spinel, Cr2O3, Si-rich interface, and Al2O 3 internal oxide. Although the scale formation mechanism is similar between conventional and modified alloys, the oxide scale growth rates were decreased in the modified Fe-Cr alloy. The electrical conductivity of oxidized Fe-Cr alloys was improved in the modified Fe-Cr alloy due to thinner oxide scale thickness and complete Cr2O3 film with less distribution of insulating Si and Al internal oxides.

AB - Effects of silicon and aluminum concentrations in Fe-Cr alloys on the formation of oxide scales were examined in H2-H2O atmosphere for interconnects of solid oxide fuel cells (SOFCs), The morphology and oxide scale growth rates were compared between conventional and modified Fe-Cr alloys (Si and Al concentration reduced). The formed oxide scales were characterized by surface and depth profile analyses. Oxide scales were composed of the following oxide phases from surface to inner oxide scale: Mn-Cr-(Fe) spinel, Cr2O3, Si-rich interface, and Al2O 3 internal oxide. Although the scale formation mechanism is similar between conventional and modified alloys, the oxide scale growth rates were decreased in the modified Fe-Cr alloy. The electrical conductivity of oxidized Fe-Cr alloys was improved in the modified Fe-Cr alloy due to thinner oxide scale thickness and complete Cr2O3 film with less distribution of insulating Si and Al internal oxides.

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JO - International Journal of Hydrogen Energy

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