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Internal friction and Young’s modulus of Si3N4/BN fibrous monoliths at various vibrational strain amplitudes

  • Defects, Dislocations, and Physics of Strength
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Abstract

The effect of temperature and vibrational strain amplitude on Young’s modulus and an ultrasound damping (internal friction) of ceramic boron nitride samples and silicon nitride/boron nitride fibrous monoliths was studied. It was shown that the elastic moduli and the elastic vibration decrement of the low-modulus BN ceramic and of the high-modulus Si3N4/BN monoliths measured at small strain amplitudes (in the region of amplitude-independent internal friction) exhibit a noticeable temperature hysteresis. Temperature exerts the smallest effect on the amplitude-independent decrement and on the amplitude-dependent damping and Young’s modulus defect of a monolith whose filaments are arranged both along and perpendicular to the axis of a rodshaped sample. These parameters behave in the most complicated way in a sample with all its filaments aligned with the rod axis. The observed relations can be assigned to structural features of the monoliths and the considerable influence of transverse strain on the evolution of defect structure in the materials studied.

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Authors and Affiliations

  1. Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia

    B. K. Kardashev & B. I. Smirnov

  2. Argonne National Laboratory, Argonne, Illinois, 60439, USA

    D. Singh & K. C. Goretta

  3. Universidad de Sevilla, Sevilla, 41080, Spain

    A. R. de Arellano-López

Authors
  1. B. K. Kardashev
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  2. B. I. Smirnov
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  3. D. Singh
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  4. K. C. Goretta
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  5. A. R. de Arellano-López
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Translated from Fizika Tverdogo Tela, Vol. 45, No. 3, 2003, pp. 451–455.

Original Russian Text Copyright © 2003 by Kardashev, Smirnov, Singh, Goretta, de Arellano-Lopez.

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Kardashev, B.K., Smirnov, B.I., Singh, D. et al. Internal friction and Young’s modulus of Si3N4/BN fibrous monoliths at various vibrational strain amplitudes. Phys. Solid State 45, 477–481 (2003). https://doi.org/10.1134/1.1562233

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  • DOI: https://doi.org/10.1134/1.1562233

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