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

    Authors

    Y. Chen; N. Orlovskaya; T. Graule;J. Kuebler

    Comments

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    Abbreviated Journal Title

    J. Eur. Ceram. Soc.

    Keywords

    Fuel cells; Microstructure; Mechanical properties; Scandia and ceria; stabilized zirconia; YTTRIA-STABILIZED ZIRCONIA; PORE-SIZE MEASUREMENT; NICKEL-BASED ANODES; X-RAY-DIFFRACTION; NI-SCSZ CERMET; CARBON DEPOSITION; RECRYSTALLIZED; SILICONCARBIDE; TEMPERATURE SOFCS; RAMAN-SCATTERING; PHASE-STABILITY; Materials Science, Ceramics

    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/10 mol% Sc2O3-1 mol% 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 degrees C and 800 degrees C, the anode specimens exhibited purely elastic deformation and brittle fracture, a brittle-to-ductile transition occurred for heating above 800 degrees C and the anode deformed plastically at 900 degrees C. Fractography of the anode specimens were performed to identify the fracture modes of anodes tested at different temperatures. (C) 2012 Elsevier Ltd. All rights reserved.

    Journal Title

    Journal of the European Ceramic Society

    Volume

    33

    Issue/Number

    3

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    557

    Last Page

    564

    WOS Identifier

    WOS:000313772800011

    ISSN

    0955-2219

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