LaCrO3-based coatings on ferritic stainless steel for solid oxide fuel cell interconnect applications

J. H. Zhu; Y. Zhang; A. Basu; Z. G. Lu; M. Paranthaman; D. F. Lee; E. A. Payzant

doi:10.1016/j.surfcoat.2003.05.003

LaCrO₃-based coatings on ferritic stainless steel for solid oxide fuel cell interconnect applications

J. H. Zhu, Y. Zhang, A. Basu, Z. G. Lu, M. Paranthaman, D. F. Lee, E. A. Payzant

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

100 Scopus citations

Abstract

A thin layer of doped lanthanum chromite on ferritic steel may act as a protective coating to mitigate the Cr volatility problems and facilitate the use of metallic interconnect in solid oxide fuel cells operated at intermediate temperatures. In this paper, the LaCrO₃ thin film was successfully synthesized on a ferritic stainless steel substrate by two approaches, i.e. reactive formation and sol-gel processing. The coating structures and surface morphologies were analyzed using X-ray diffraction and scanning electron microscopy. After isothermal oxidation at 850 °C for 100 h in air, the electrical resistance of the sol-gel coated samples remained very low, as compared to that of the uncoated sample after similar thermal exposure. The sol-gel coating also provided effective protection for the interconnect steel during oxidation of twelve 100-h cycles at 800 °C in air, whereas significant spallation and weight loss were observed for the uncoated steel. The two coating processes (i.e. reactive formation and sol-gel processing) were compared and their advantages and drawbacks were outlined.

Original language	English
Pages (from-to)	65-72
Number of pages	8
Journal	Surface and Coatings Technology
Volume	177-178
DOIs	https://doi.org/10.1016/j.surfcoat.2003.05.003
State	Published - Jan 30 2004

Funding

This research project was financially supported by Honda R&D Americas, Inc. through a Honda Initiation Grant Award and by National Science Foundation through grant DMR-0238113. Part of this work was also supported by the Center for Manufacturing Research, Tennessee Technological University (TTU) and by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of FreedomCAR and Vehicle Technologies, as part of the High Temperature Materials Laboratory User Program, Oak Ridge National Laboratory, managed by UT-Battelle, LLC for the US Department of Energy under contract number DE-AC05-00OR22725. Finally, the authors would like to thank R.E. Packingham, TTU, for his assistance in oxidation tests.

Funders	Funder number
Center for Manufacturing Research
Honda R&D Americas, Inc.
Office of FreedomCar
Tennessee Technological University
National Science Foundation	DMR-0238113
U.S. Department of Energy	DE-AC05-00OR22725
Office of Energy Efficiency and Renewable Energy
Oak Ridge National Laboratory
UT-Battelle

Keywords

Ferritic stainless steel
Sol-gel processing
Solid oxide fuel cell

UN SDGs

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

Access to Document

10.1016/j.surfcoat.2003.05.003

Cite this

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title = "LaCrO3-based coatings on ferritic stainless steel for solid oxide fuel cell interconnect applications",

abstract = "A thin layer of doped lanthanum chromite on ferritic steel may act as a protective coating to mitigate the Cr volatility problems and facilitate the use of metallic interconnect in solid oxide fuel cells operated at intermediate temperatures. In this paper, the LaCrO3 thin film was successfully synthesized on a ferritic stainless steel substrate by two approaches, i.e. reactive formation and sol-gel processing. The coating structures and surface morphologies were analyzed using X-ray diffraction and scanning electron microscopy. After isothermal oxidation at 850 °C for 100 h in air, the electrical resistance of the sol-gel coated samples remained very low, as compared to that of the uncoated sample after similar thermal exposure. The sol-gel coating also provided effective protection for the interconnect steel during oxidation of twelve 100-h cycles at 800 °C in air, whereas significant spallation and weight loss were observed for the uncoated steel. The two coating processes (i.e. reactive formation and sol-gel processing) were compared and their advantages and drawbacks were outlined.",

keywords = "Ferritic stainless steel, Sol-gel processing, Solid oxide fuel cell",

author = "Zhu, {J. H.} and Y. Zhang and A. Basu and Lu, {Z. G.} and M. Paranthaman and Lee, {D. F.} and Payzant, {E. A.}",

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AU - Zhu, J. H.

AU - Zhang, Y.

AU - Basu, A.

AU - Lu, Z. G.

AU - Paranthaman, M.

AU - Lee, D. F.

AU - Payzant, E. A.

PY - 2004/1/30

Y1 - 2004/1/30

N2 - A thin layer of doped lanthanum chromite on ferritic steel may act as a protective coating to mitigate the Cr volatility problems and facilitate the use of metallic interconnect in solid oxide fuel cells operated at intermediate temperatures. In this paper, the LaCrO3 thin film was successfully synthesized on a ferritic stainless steel substrate by two approaches, i.e. reactive formation and sol-gel processing. The coating structures and surface morphologies were analyzed using X-ray diffraction and scanning electron microscopy. After isothermal oxidation at 850 °C for 100 h in air, the electrical resistance of the sol-gel coated samples remained very low, as compared to that of the uncoated sample after similar thermal exposure. The sol-gel coating also provided effective protection for the interconnect steel during oxidation of twelve 100-h cycles at 800 °C in air, whereas significant spallation and weight loss were observed for the uncoated steel. The two coating processes (i.e. reactive formation and sol-gel processing) were compared and their advantages and drawbacks were outlined.

AB - A thin layer of doped lanthanum chromite on ferritic steel may act as a protective coating to mitigate the Cr volatility problems and facilitate the use of metallic interconnect in solid oxide fuel cells operated at intermediate temperatures. In this paper, the LaCrO3 thin film was successfully synthesized on a ferritic stainless steel substrate by two approaches, i.e. reactive formation and sol-gel processing. The coating structures and surface morphologies were analyzed using X-ray diffraction and scanning electron microscopy. After isothermal oxidation at 850 °C for 100 h in air, the electrical resistance of the sol-gel coated samples remained very low, as compared to that of the uncoated sample after similar thermal exposure. The sol-gel coating also provided effective protection for the interconnect steel during oxidation of twelve 100-h cycles at 800 °C in air, whereas significant spallation and weight loss were observed for the uncoated steel. The two coating processes (i.e. reactive formation and sol-gel processing) were compared and their advantages and drawbacks were outlined.

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