Abstract
The acoustic and piezoelectric emissions of ferroelectric ceramics under thermomechanical loading conditions are studied. It is shown that the reason for development of one emission or another is thermally activated relaxation of internal mechanical stresses by 90° domain reorientations. A phenomenological explanation of this effect is suggested. A direct correlation between the phenomena observed with microstructural processes occurring in piezoelectric ceramics in the first stage of fatigue is established.
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Translated from Problemy Prochnosti, No. 10, pp. 56–59, October, 1990.
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Firsov, V.V., Negovskii, A.N., Pisarenko, G.G. et al. Damage mechanism for ferroelectric ceramics with mechanical loading. Strength Mater 22, 1455–1458 (1990). https://doi.org/10.1007/BF00767231
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DOI: https://doi.org/10.1007/BF00767231