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1993
Journal Article
Titel
Nondestructive testing of ceramic coatings on steel by photoacoustic, photothermal and high-frequency ultrasound techniques
Abstract
Adhesion of tungsten carbide coatings with a thickness of about 300 fm on steel subtrates has been tested by photoacoustic microscopy at 33.8 kHz, by photothermal raiometry at 20-200 Hz and by high-frequency ultrasound measurements at 80 MHz. Delaminated regions of the coating were detected in good agreement with the photoacoustic and the ultrasound technique.