Abstract
The Vickers indentation zones in Al2O3-SiC-TiC ceramics were studied by scanning laser photoacoustic microscopy. It is shown that the method of photoacoustic microscopy with a piezoelectric detector is sensitive to external mechanical stresses. Variation of the photoacoustic response signal under the action of normal and tangent stresses in the vicinity of radial cracks was determined. The photoacoustic data can be used to estimate the stress intensity coefficients at the crack end.
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