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1992
Conference Paper
Titel
Nondestructive testing of ceramics by computed tomography and high-frequency ultrasonics
Abstract
An ultrasonic pulse-echo inspection system (up to 100 MHz) has been equiped with a fast digitizer in order to allow a full volume acquisition of ultrasonic data. A powerful workstation with modern visualtization software is used to represent the ultrasonic voume data. Any desired cross section plan inside the object can be selected and displayed in real time. Snall defects and variations in the density distribution are imaged by the computed tomography (fCT) with high contrast. In the reconstructed cross sections a pixel size down to 10 fm is realized. Among all the requirements which a system with high resolution capabilities has to accomplish, we are especially discussing the influence of the raiographic imaging system on the achievable resolution. The same software, used to represent the ultrasonic volume data, is also employed for d 3D-visualization of the 2D reconstructed cross sections of the fCT.