Disc Voids

Pictured

Time Domain Imaging (TDI)™
Utilizes an echo (amplitude & polarity) arrival ‘time’ as a reference, such as standard A-Scan, B-Scan and C-Mode type images.

Disc Voids

Ceramic Disc Voids - Application Note 2187

Disc Voids

Sample & Method

A high-performance ceramic disk having a thickness of 9.53 mm (0.375 inches) and a diameter of 20.3 mm (0.8 inches). The disk was scanned per VRM and the data file saved. The images and analysis reported here are from the data file. To make the three images shown above, return signals in the data file were gated at depths of 2.95 mm (left), 3.50 mm (center) and 4.05 mm (right). Red areas are the voids.

Result

The voids become larger with depth. Images above the depths shown here also revealed scattered small voids. The irregular dark regions away from the voids in the images above may be clusters of very small voids (i.e., porosity).