Abstract
Acoustic emission has been used as a nondestructive evaluation technique to examine the thermal shock response of thermal barrier coatings. In this study, samples of partially stabilized zirconia powder were sprayed and acoustic emission (AE) data were taken in a series of thermal shock tests in an effort to correlate AE with a given failure mechanism. Microstructural evidence was examined using parallel beam x-ray diffraction and optical microscopy. The AE data are discussed in terms of cumulative amplitude distributions and the use of this technique to characterize fracture events.
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References
L.M. Sheppard, Evolution of NDE Continues for Ceramics, Am. Ceram. Soc. Bull., Vol 70, 1991, p 1265–1279
H. Nakahira, Y. Harada, N. Mifune, T. Yogoro, and H. Yamane, Advanced Thermal Barrier Coatings Involving Efficient Vertical Microcracks, Proc. International Thermal Spray Conf., ASM International, 1992, p 519–523
N.R. Shankar, C.C. Berndt, H. Herman, and S. Rangaswamy, Acoustic Emission from Thermally Cycled Plasma Sprayed Oxides, Am. Ceram. Soc. Bull., Vol 62, 1983, p 614–619
J.R. Matthews, Ed., Nondestructive Testing Monographs and Tracts, Vol 2, Acoustic Emission, Gordon and Breach Science Publishers, 1983
A.A. Pollock, Acoustic Emission Inspection, Metals Handbook, 9th ed., Vol 17, ASM International, 1989, p 278–294
Y. Hinton, Acoustic Emission, ASTM Standardization News, Jan 1995, p 36–39
A.A. Pollock, Acoustic Emission Amplitude Distributions, International Advances in Nondestructive Testing, Vol 7,1981, p 215–239
D. Almond, M. Moghisi, and H. Reiter, The Acoustic Emission Testing of Plasma-Sprayed Coatings, Thin Solid Films, Vol 108, 1983, p 439–447
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Andrews, D.J., Taylor, J.A.T. Nondestructive evaluation of plasma-sprayed thermal barrier coatings. J. of Materi Eng and Perform 6, 591–595 (1997). https://doi.org/10.1007/s11665-997-0049-5
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DOI: https://doi.org/10.1007/s11665-997-0049-5