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Effect of Electrical Field/Current on Sintering of Fully Stabilized Zirconia

Authors

  • Raschid Baraki,

    Corresponding author
    • Institute of Materials Science, Technische Universität Darmstadt, D-64287 Darmstadt, Germany
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  • Sebastian Schwarz,

    1. Institute of Materials Science, Technische Universität Darmstadt, D-64287 Darmstadt, Germany
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  • Olivier Guillon

    1. Institute of Materials Science, Technische Universität Darmstadt, D-64287 Darmstadt, Germany
    Current affiliation:
    1. Institute of Materials Science and Technology, Friedrich-Schiller-Universität Jena, Jena, Germany
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    • Member, The American Ceramic Society.

  • This work was supported by the Deutsche Forschungsgemeinschaft (Emmy Noether Program GU 993/1).

Author to whom correspondence should be addressed. e-mail: olivier.guillon@uni-jena.de

Abstract

To highlight the peculiarities of sintering under electric field, 8 mol% yttria-stabilized zirconia (8YSZ) specimens were tested in a sinter-forging apparatus equipped with laser scanners and power supply. This enables to monitor axial and radial shrinkage under controlled ac field with current limitation. Current flow results in expansion related to an increase of several hundreds of °C. This proves that the whole specimen experiences, due to Joule heating, significantly higher temperatures than its environment.

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