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Elastic Precursor Decay and Spallation in Nonporous Tungsten Carbide Ceramics

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Abstract

To identify the possible contribution of relaxation processes to the resistance against high-rate deformation, evolution of shock-compression waves in tungsten carbide (WC) ceramics manufactured by spark-plasma sintering at a maximum compressive stress of 27 GPa is measured. Strong elastic precursor decay upon changing the thickness of the samples from 0.15 to 4 mm is revealed. At maximum shock compressive stresses twice exceeding the Hugoniot elastic limit, a decrease in the spall strength value by about 30% from its value in the elastic region is recorded.

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ACKNOWLEDGMENTS

This study was performed in accordance with State Assignment, topic no. 0089-2014-0016, and within the Program of Fundamental Studies of the Presidium of the Russian Academy of Sciences no. 13, “Condensed Matter and Plasma at High Energy Densities, Research Direction Quick Physicochemical Transformations and Fracture of Solid Bodies and Liquids.”

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    A. S. Savinykh, I. A. Cherepanov & S. V. Razorenov

  2. Moscow State University, 119991, Moscow, Russia

    I. A. Cherepanov

  3. Freiberg University of Mining and Technology, 09599, Freiberg, Germany

    K. Mandel & L. Krüger

Authors
  1. A. S. Savinykh
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  2. I. A. Cherepanov
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  3. S. V. Razorenov
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  4. K. Mandel
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  5. L. Krüger
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Correspondence to A. S. Savinykh.

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Translated by O. Kadkin

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Savinykh, A.S., Cherepanov, I.A., Razorenov, S.V. et al. Elastic Precursor Decay and Spallation in Nonporous Tungsten Carbide Ceramics. Tech. Phys. 64, 356–360 (2019). https://doi.org/10.1134/S1063784219030216

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  • DOI: https://doi.org/10.1134/S1063784219030216

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