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Acoustic emission during fracture of ceramic superconducting materials

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[1] Woźny, L.
[2] Kisiel, A.
[3] Lysy, K.
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| 1600年 / IOP Publishing Ltd卷 / 113期
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In the ceramic materials acoustic emission (AE) is associated with a rapid elastic energy release due to the formation and expansion of cracks; which causes generation and propagation of the elastic wave. AE pulses measurement allows monitoring of internal stresses changes and the development of macro- and micro-cracks in ceramic materials; and that in turn allows us to evaluate the time to failure of the object. In presented work the acoustic signals generated during cracking of superconducting ceramics were recorded. Results obtained were compared with other ceramic materials tested the same way. An analysis of the signals was carried out. The characteristics of the AE before destruction of the sample were determined; that allow the assessment of the condition of the material during operation and its expected lifetime. © Published under licence by IOP Publishing Ltd;
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