8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-603-C7-606
Detection of surface damage in ceramics by photothermal and photoacoustic techniquesH. Zhang, S. Gissinger, G. Weides and U. Netzelmann
Fraunhofer-Institute for Nondestructive Testing (IzfP), University, Bldg. 37, 66123 Saarbrücken, Germany
Cracks produced by indenters in zirconia-TiC ceramic and surface defects in SiSiC ceramic generated by machining were imaged by photothermal radiometry, mirage effect, photoacoustic microscopy with gas cell and piezoelectric detection and scanning acoustic microscopy. The different appearance of the artificial cracks is studied in comparison.
© EDP Sciences 1994