Review on oxidation behavior and chromium volatilization of Fe-Cr-based interconnects at high operation temperatures of solid oxide fuel cells

Research output: Contribution to journalArticle

Abstract

Reduction of operating temperature to the range of 600 - 800 °C allows metallic alloys to be considered as solid oxide fuel cells (SOFCs) interconnects. Of all SOFC components, interconnects have the most stringent criteria as they are required to work in both oxidizing and reducing conditions. To date, Fe-Cr alloys are the most promising candidates owing to their good oxidation resistance, electrical conduction, and matching thermal expansion coefficient with SOFC components. Unfortunately, the alloys are susceptible to the formation of oxide scales which are (Mn,Cr)3O4 and Cr2O3 at elevated temperatures. Moreover, thermodynamic instability in the cathode environment causes Cr volatilization from the scales, which subsequently cause cell degradation. The volatilization can be retarded with the use of protective coating or specially designed alloys with tailored compositions that enhances Laves phase precipitation. The oxidation behavior of the metallic interconnects, Cr volatilization, and their relationship with the composition of metallic alloys will be discussed.

Original languageEnglish
Pages (from-to)148-155
Number of pages8
JournalJournal of Advanced Research in Fluid Mechanics and Thermal Sciences
Volume59
Issue number1
Publication statusPublished - 1 Jul 2019

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High temperature operations
Chromium
Solid oxide fuel cells (SOFC)
Vaporization
Oxidation
Oxidation resistance
Protective coatings
Chemical analysis
Oxides
Thermal expansion
Cathodes
Thermodynamics
Degradation
Temperature

Keywords

  • Cr volatilization
  • Ferritic stainless steel
  • Interconnect
  • Oxide scale
  • SOFC

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

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title = "Review on oxidation behavior and chromium volatilization of Fe-Cr-based interconnects at high operation temperatures of solid oxide fuel cells",
abstract = "Reduction of operating temperature to the range of 600 - 800 °C allows metallic alloys to be considered as solid oxide fuel cells (SOFCs) interconnects. Of all SOFC components, interconnects have the most stringent criteria as they are required to work in both oxidizing and reducing conditions. To date, Fe-Cr alloys are the most promising candidates owing to their good oxidation resistance, electrical conduction, and matching thermal expansion coefficient with SOFC components. Unfortunately, the alloys are susceptible to the formation of oxide scales which are (Mn,Cr)3O4 and Cr2O3 at elevated temperatures. Moreover, thermodynamic instability in the cathode environment causes Cr volatilization from the scales, which subsequently cause cell degradation. The volatilization can be retarded with the use of protective coating or specially designed alloys with tailored compositions that enhances Laves phase precipitation. The oxidation behavior of the metallic interconnects, Cr volatilization, and their relationship with the composition of metallic alloys will be discussed.",
keywords = "Cr volatilization, Ferritic stainless steel, Interconnect, Oxide scale, SOFC",
author = "Isyraf Aznam and Mah, {Joelle Chia Wen} and Andanastuti Muchtar and Somalu, {Mahendra Rao} and Ghazali, {Mariyam Jameelah}",
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T1 - Review on oxidation behavior and chromium volatilization of Fe-Cr-based interconnects at high operation temperatures of solid oxide fuel cells

AU - Aznam, Isyraf

AU - Mah, Joelle Chia Wen

AU - Muchtar, Andanastuti

AU - Somalu, Mahendra Rao

AU - Ghazali, Mariyam Jameelah

PY - 2019/7/1

Y1 - 2019/7/1

N2 - Reduction of operating temperature to the range of 600 - 800 °C allows metallic alloys to be considered as solid oxide fuel cells (SOFCs) interconnects. Of all SOFC components, interconnects have the most stringent criteria as they are required to work in both oxidizing and reducing conditions. To date, Fe-Cr alloys are the most promising candidates owing to their good oxidation resistance, electrical conduction, and matching thermal expansion coefficient with SOFC components. Unfortunately, the alloys are susceptible to the formation of oxide scales which are (Mn,Cr)3O4 and Cr2O3 at elevated temperatures. Moreover, thermodynamic instability in the cathode environment causes Cr volatilization from the scales, which subsequently cause cell degradation. The volatilization can be retarded with the use of protective coating or specially designed alloys with tailored compositions that enhances Laves phase precipitation. The oxidation behavior of the metallic interconnects, Cr volatilization, and their relationship with the composition of metallic alloys will be discussed.

AB - Reduction of operating temperature to the range of 600 - 800 °C allows metallic alloys to be considered as solid oxide fuel cells (SOFCs) interconnects. Of all SOFC components, interconnects have the most stringent criteria as they are required to work in both oxidizing and reducing conditions. To date, Fe-Cr alloys are the most promising candidates owing to their good oxidation resistance, electrical conduction, and matching thermal expansion coefficient with SOFC components. Unfortunately, the alloys are susceptible to the formation of oxide scales which are (Mn,Cr)3O4 and Cr2O3 at elevated temperatures. Moreover, thermodynamic instability in the cathode environment causes Cr volatilization from the scales, which subsequently cause cell degradation. The volatilization can be retarded with the use of protective coating or specially designed alloys with tailored compositions that enhances Laves phase precipitation. The oxidation behavior of the metallic interconnects, Cr volatilization, and their relationship with the composition of metallic alloys will be discussed.

KW - Cr volatilization

KW - Ferritic stainless steel

KW - Interconnect

KW - Oxide scale

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