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Direct Observation of Processes at Particle-to-Particle Contacts during Electric Pulse Consolidation of a Titanium Powder

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Abstract

Direct high-speed micro video recording data proved the existence of highly overheated zones at contacts of powder particles through which electric current pulses about 1 ms long were sent. The overheating might exceed 1600 K and could give rise to liquid-phase sintering necks, the sizes of which correlated well with the sizes of the overheated zones. Temperature field microheterogeneities during electric pulse heating of the powder medium gave an insight into unusually high rates of consolidation of powder materials during spark plasma sintering.

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ACKNOWLEDGMENTS

We thank S.M. Godin for designing and building an electronic circuit for controlling an electric discharge.

Funding

This work was supported by the Russian Foundation for Basic Research (project no. 19–03–00293).

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Authors and Affiliations

  1. Merzhanov Institute of Structural Macrokinetics and Problems of Materials Science, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    A. S. Rogachev, S. G. Vadchenko, V. A. Kudryashov, A. S. Shchukin &  M. I. Alymov

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  1. A. S. Rogachev
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  2. S. G. Vadchenko
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  3. V. A. Kudryashov
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  4. A. S. Shchukin
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  5. M. I. Alymov
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Corresponding author

Correspondence to A. S. Rogachev.

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Translated by V. Glyanchenko

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Rogachev, A.S., Vadchenko, S.G., Kudryashov, V.A. et al. Direct Observation of Processes at Particle-to-Particle Contacts during Electric Pulse Consolidation of a Titanium Powder. Dokl Phys Chem 488, 151–153 (2019). https://doi.org/10.1134/S001250161910004X

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  • DOI: https://doi.org/10.1134/S001250161910004X

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