The analysis of the influence of the thermal shocks on acoustic emission signal generated in cordierite ceramics
Abstract
The paper describes a raw materials composition and manufacturing technology of cordierite material, applied to manufacturing of welding backing strips. The resistance of the cordierite specimens to thermal shock within the range of 150–320°C was analysed. Shocked samples, submitted to three - point mechanical stress, have been investigated by acoustic emission method. The results let the authors to conclude that there is a correlation between the Acoustic Emission (AE) signals parameter, describing the AE activity during the loading and the stage of material degradation caused by the applied thermal shock.References
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[2] K. Konsztowicz, Acoustic emission study of the resistance to thermal shock of ceramic materials, J. Am. Ceramic Soc., 73, 3, 502–508 (1990).
[3] K. Ono, AE Arising from Plastic Deformation and Fracture, Fundamentals of AE, Univ. of California, Los Angeles 1979, pp. 167–207.
[4] Polish Standard No. PN–86/E–06301 “Insulating ceramic materials. Classification and requirements”, Alfa, Polish Standard Publ., 1986.
[5] J. Ranachowski, P. Ranachowski and J. Bertrand, Acoustic emission in thermomechanic tests of line insulators [in Polish] [in:] New Methods of Technology and Materials Science, IFTR PAS, Warszawa 1999, pp. 47–59.
[6] Z. Ranachowski, Acoustic emission measurements in ceramic, wood and metals [in Polish], Scientific Bulletins of University of Mining and Metallurgy, 14, 2, Kraków 1995, pp. 130–142.
