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Effect of pulsed DC current on neck growth between tungsten wires and tungsten plates during the initial stage of sintering by the spark plasma sintering method

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Abstract

The spark plasma sintering of tungsten wires to tungsten plates was investigated to assess the effect of the current. Neck growth between wires and plates was about 1.5 larger in the presence of current than when the current was absent. The neck growth was controlled by an evaporation–condensation mechanism. The mechanism, however, does not relate to the sintering of tungsten, but to the control of a surface oxide reduction, in agreement with previous investigations.

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Acknowledgements

The authors acknowledge the partial supports of this study by a grant based on High-Tech Research Center Program for private Universities from the Japan Ministry of Education, Culture, Sport, Science and Technology (MO) and by the Army Research Office, ARO (ZAM).

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Authors and Affiliations

  1. Department of Materials Chemistry, Ryukoku University, Seta, Ohtsu, 520-2194, Japan

    Naoki Toyofuku, Takuya Kuramoto, Takahito Imai & Manshi Ohyanagi

  2. Department of Chemical Engineering and Materials Science, University of California, Davis, CA, 95616, USA

    Zuhair A. Munir

Authors
  1. Naoki Toyofuku
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  2. Takuya Kuramoto
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  3. Takahito Imai
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  4. Manshi Ohyanagi
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  5. Zuhair A. Munir
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Correspondence to Manshi Ohyanagi.

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Toyofuku, N., Kuramoto, T., Imai, T. et al. Effect of pulsed DC current on neck growth between tungsten wires and tungsten plates during the initial stage of sintering by the spark plasma sintering method. J Mater Sci 47, 2201–2205 (2012). https://doi.org/10.1007/s10853-011-6026-2

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  • DOI: https://doi.org/10.1007/s10853-011-6026-2

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