Microstructure and mechanical properties of Ni/10mol% Sc2O3-1mol% CeO2-ZrO2 cermet anode for solid oxide fuel cells

Yan Chen; Nina Orlovskaya; Thomas Graule; Jakob Kuebler

doi:10.1016/j.jeurceramsoc.2012.10.003

Microstructure and mechanical properties of Ni/10mol% Sc₂O₃-1mol% CeO₂-ZrO₂ cermet anode for solid oxide fuel cells

Yan Chen, Nina Orlovskaya, Thomas Graule, Jakob Kuebler

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

5 Scopus citations

Abstract

The mechanical properties of anode materials play an important role in the reliability and durability of solid oxide fuel cells operating at high temperatures in a reducing environment. In this paper, we produced the results of the mechanical properties investigation of Ni/10mol% Sc₂O₃-1mol% CeO₂-ZrO₂ cermet anodes. Young's modulus as well as strength and fracture toughness of non-reduced and reduced anodes has been measured, both at room and at high temperatures. High temperature experiments were performed in the reducing environment of forming gas. It is shown that while at 700°C and 800°C, the anode specimens exhibited purely elastic deformation and brittle fracture, a brittle-to-ductile transition occurred for heating above 800°C and the anode deformed plastically at 900°C. Fractography of the anode specimens were performed to identify the fracture modes of anodes tested at different temperatures.

Original language	English
Pages (from-to)	557-564
Number of pages	8
Journal	Journal of the European Ceramic Society
Volume	33
Issue number	3
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2012.10.003
State	Published - Mar 2013
Externally published	Yes

Funding

This work was supported by the NSF projects DMR-0748364 and CMMI-1030833, and Oak Ridge National Laboratory's Shared Research Equipment (ShaRE) User Program, sponsored by the Office of Basic Energy Sciences, U.S. DOE. We thank Hansjürgen Schindler and Roland Bächtold for their kind help with porosity measurement and mechanical testing in Empa. We also thank David Restrepo and Richard G. Blair in Department of Chemistry in University of Central Florida for their help with X-ray diffraction.

Keywords

Fuel cells
Mechanical properties
Microstructure
Scandia and ceria stabilized zirconia

Access to Document

10.1016/j.jeurceramsoc.2012.10.003

Cite this

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title = "Microstructure and mechanical properties of Ni/10mol\% Sc2O3-1mol\% CeO2-ZrO2 cermet anode for solid oxide fuel cells",

abstract = "The mechanical properties of anode materials play an important role in the reliability and durability of solid oxide fuel cells operating at high temperatures in a reducing environment. In this paper, we produced the results of the mechanical properties investigation of Ni/10mol\% Sc2O3-1mol\% CeO2-ZrO2 cermet anodes. Young's modulus as well as strength and fracture toughness of non-reduced and reduced anodes has been measured, both at room and at high temperatures. High temperature experiments were performed in the reducing environment of forming gas. It is shown that while at 700°C and 800°C, the anode specimens exhibited purely elastic deformation and brittle fracture, a brittle-to-ductile transition occurred for heating above 800°C and the anode deformed plastically at 900°C. Fractography of the anode specimens were performed to identify the fracture modes of anodes tested at different temperatures.",

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AU - Orlovskaya, Nina

AU - Graule, Thomas

AU - Kuebler, Jakob

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AB - The mechanical properties of anode materials play an important role in the reliability and durability of solid oxide fuel cells operating at high temperatures in a reducing environment. In this paper, we produced the results of the mechanical properties investigation of Ni/10mol% Sc2O3-1mol% CeO2-ZrO2 cermet anodes. Young's modulus as well as strength and fracture toughness of non-reduced and reduced anodes has been measured, both at room and at high temperatures. High temperature experiments were performed in the reducing environment of forming gas. It is shown that while at 700°C and 800°C, the anode specimens exhibited purely elastic deformation and brittle fracture, a brittle-to-ductile transition occurred for heating above 800°C and the anode deformed plastically at 900°C. Fractography of the anode specimens were performed to identify the fracture modes of anodes tested at different temperatures.

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KW - Microstructure

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