Location

La Jolla, CA

Start Date

1979 12:00 AM

Description

The technique of laser photoacoustic spectroscopy is applied to the studies of surface and sub-surface structures of solids in a nondestructive fashion. In the present case, special attention is focused on reaction-bonded Si N ceramics, which are used for the manufacturing of turbine blades. Good correlation is obtained between the observed photoacoustic signal and surface microstructures. In addition, the photoacoustic signal reveals inhomogeneities that are not visually detected under a microscope.

Book Title

Proceedings of the ARPA/AFML Review of Progress in Quantitative NDE

Chapter

11. Fundamentals and New Techniques

Pages

374-376

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Laser Photoacoustic Technique for NDE

La Jolla, CA

The technique of laser photoacoustic spectroscopy is applied to the studies of surface and sub-surface structures of solids in a nondestructive fashion. In the present case, special attention is focused on reaction-bonded Si N ceramics, which are used for the manufacturing of turbine blades. Good correlation is obtained between the observed photoacoustic signal and surface microstructures. In addition, the photoacoustic signal reveals inhomogeneities that are not visually detected under a microscope.