Elastic Loss and Dispersion in Ceramic-Matrix Piezocomposites

A. N. Rybyanets*, A. A. Naumenko, G. M. Konstantinov,
N. A. Shvetsova, and M. A. Lugovaya

Research Institute of Physics, Southern Federal University, pr. Stachki 194, Rostov-on-Don, 344090 Russia

* e-mail: arybyanets@gmail.com

Abstract—Ceramic-matrix composites of different types have been comprehensively studied using three-
dimensional numerical simulation, resonance analysis of impedance spectra, and pulse-echo ultrasonic mea-
surements. The results of finite-difference simulation of longitudinal ultrasonic wave propagation in different
viscoelastic ceramic-matrix composites (porous ceramics and ceramics/crystal) have been presented. The
experimental studies have revealed regions of elastic dispersion characterized by anomalies of the frequency
dependences of the imaginary and real parts of the elastic moduli. The simulation results have been compared
with experimental data.

DOI: 10.1134/S1063783415030269

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