Non-destructive testing of the metal-insulator-metal using miniature eddy current transducers

Abstract

The paper puts forward a modified eddy current testing method based on the use of miniature eddy current transducers within a localized controlled area of the material surface of up to 50 7 μm2. Measurement results are provided for a model composite material made up of alternating conducting and dielectric layers of system Al-PAPER-Al. Structural flaws are specified as changes in the number and position of layers in the sequence. Prospects of the proposed method and a measuring device operating on its basis for flaw detection in composite aluminum alloy materials are shown.