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Evaluation of Microstructural Evolution of Nanostructured Yttria-stabilized Zirconia During Sintering Using Impedance Spectroscopy

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Abstract

A non-destructive evaluation (NDE) technique of impedance spectroscopy (IS) was employed for studying the sintering process of nanostructured yttria-stabilized zirconia (YSZ) after exposure at 1100 °C in air for different times. The variations within microstructure of YSZ were correlated with the EIS parameters. The results showed that the resistance and capacitance of YSZ grains (g) and grain boundaries (gb) varied with the sintering time. The resistance of YSZ g and gb increased significantly in 10 h, which may correspond to closure of pores. While during the stage from 10 to 200 h, the resistance of the g was basically consistent, and the gb decreased with the growth of g, which indicated that the gb resistance was more sensitive to grain size. The change of porosity and pore shape could be interpreted through impedance parameters. The porosity decreased and the shape of pores became smaller and rounder with the increasing sintering time.

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Acknowledgments

This work was supported by the Aviation Science Foundation of 2011ZF51062.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Key Laboratory of Aerospace Materials and Performance (Ministry of Education), Beijing, 100191, China

    Chenchen Ge, Liyong Ni & Chungen Zhou

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  1. Chenchen Ge
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  2. Liyong Ni
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  3. Chungen Zhou
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Correspondence to Chungen Zhou.

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Ge, C., Ni, L. & Zhou, C. Evaluation of Microstructural Evolution of Nanostructured Yttria-stabilized Zirconia During Sintering Using Impedance Spectroscopy. J Therm Spray Tech 21, 1076–1082 (2012). https://doi.org/10.1007/s11666-012-9787-5

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  • DOI: https://doi.org/10.1007/s11666-012-9787-5

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