New Techniques in Nondestructive Testing by Acoustical and Exo-electron Emission.
Abstract
During the course of investigating the frequency response of various piezoelectric transducers for use in acoustical emission studies, the need arose for a very wide frequency range acoustical generator. The repor describes the new generator and applies it to the calibration of several quartz and PZT-5 transducers. Nickel wires were fatigued in alternating torsion, in air, to some fraction of their total life. The wires were then heated in argon or carbon dioxide to induce exo-electron emission. Emission occured at temperatures of 400C or less. Typical results are shown.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1969
- Accession Number
- AD0720357
Entities
People
- Robert H. Chambers
- Stuart A. Hoenig
Organizations
- University of Arizona