Method and apparatus for inspection of ceramic parts for defects

Details Method and apparatus for inspection of ceramic parts for defects Method and apparatus for inspection of ceramic parts for defects

1979-06-11

1981-07-14

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

G01N 2900

Patent

active

042779774

ABSTRACT:
A method and apparatus for inspection of ceramic parts for defects utilizes the application of an electrical test voltage to the part to be inspected, and at the same time subjecting the part to acoustic emission analysis. Use of the acoustic emission analysis allows discovery of not only defects which may arise because of the application of the electric current, but also defects or structural damage which are already existant in the part to be tested. An apparatus for carrying out the method on a high-volume basis allows rapid insertion and removal of a part between electrodes and clamps the part in place during testing.

REFERENCES:
patent: 3924456 (1975-12-01), Vahaviolos
A. G. Evans et al.; "Failure Prediction in Structural Ceramics", Materials Evaluation, pp. 85-96, Apr. 1977.
J. E. Garnier et al.; "Applications of Acoustic Emission to Evaluation of Dielectric Breakdown in Insulator Materials", American Ceramic Society Bulletin, vol. 55 No. 5, pp. 553-554, May 1976.

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