Title: SONIC DETECTION OF MANUFACTURING FLAWS IN CERAMIC COMPONENTS

Abstract:
A new approach for detecting manufacturing flaws based upon the sonic vibrational spectra of the ceramic component is presented. The method involves constructing a nominal vibrational spectrum using experimental modal analysis techniques. A "sonic signature" for a particular piece is obtained by testing a number of components. Once the norms are established, subsequent parts having frequencies outside of these ranges are rejected as defective. Subsequent destructive testing has shown the validity of the sonic approach. This new method is powerful for applications where information regarding the existence of a defect is desired. This approach can be applied on line as a quality control check in a manufacturing facility.
(Ref. SXVIII-020-97)

Source: NDE of Ceramics '97 May 4-7, Symposium on Nondestructive Evaluation of Ceramics at the American Ceramic Society 99th Annual Meeting, Cincinnati, Ohio.
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