Laser Photoacoustic Technique for NDE.
Abstract
The physics of the scanning photoacoustic microscopy (SPAM) has been developed. SPAM has been applied to NDE problems in high performance ceramics, and has been shown to be potentially useful for NDE in other solids, such as metals and semiconductors. One of the most important problems in nondestructive evaluation (NDE) has been that of detecting small (10 micron - 100 micron) flaws which lie just beneath the surface of an opaque solid. This problem is particularly acute for the technologically important, but brittle, ceramic materials, SiC and Si3N4. The objective of this program was to investigate and develop an entirely new NDE experimental technique, which we have named scanning photoacoustic microscopy (SPAM), and to test its applicability for subsurface NDE of ceramics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 26, 1981
- Accession Number
- ADA107388
Entities
People
- R. L. Thomas
Organizations
- Wayne State University