Location

Santa Cruz, CA

Start Date

1-1-1984 12:00 AM

Description

A 10 to 100 MHz surface acoustic wave (SAW) system with computer controlled data acquisition and analysis was used to study the detection and characterization of surface cracks in ceramics. Surface acoustic waves were generated by placing a focused transducer at a critical angle with respect to the test specimen. The scattering of surface waves into water by the surface cracks was detected, analysed in the time domain and correlated with the size and the shape of the cracks. At 100 MHz, the SAW technique can detect cracks as small as 25 µm deep on polished ceramics.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

3A

Chapter

Chapter 2: Ultrasonics

Section

Scattering

Pages

239-249

DOI

10.1007/978-1-4684-1194-2_22

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

Surface Acoustic Wave Studies of Surface Cracks in Ceramics

Santa Cruz, CA

A 10 to 100 MHz surface acoustic wave (SAW) system with computer controlled data acquisition and analysis was used to study the detection and characterization of surface cracks in ceramics. Surface acoustic waves were generated by placing a focused transducer at a critical angle with respect to the test specimen. The scattering of surface waves into water by the surface cracks was detected, analysed in the time domain and correlated with the size and the shape of the cracks. At 100 MHz, the SAW technique can detect cracks as small as 25 µm deep on polished ceramics.