Defect Detection in Ceramic Armor Using Phased Array Ultrasound

William A. Ellingson; J. Scott Steckenrider; Thomas J. Meitzler

doi:10.4028/www.scientific.net/AST.65.143

Paper Titles

Processing and Characterization of Zr-, Hf- and Ta-Based Ultra High Temperature Ceramics
p.118

Oxidation Mechanism of ZrB₂-SiC Tested in a Solar Furnace above 2200°C
p.124

Stereological Microstructure Description of Structural SiC Ceramics as Composite Material
p.130

Oxidation Resistance of Coated and Uncoated SiC-Based Refractories
p.135

Defect Detection in Ceramic Armor Using Phased Array Ultrasound
p.143

Development of Scanning Microwave Technology for Ceramics in Extreme Environments
p.153

Development of Ultrasonic Optical Fiber Hydrogen Sensor
p.163

Determination of Lead Traces by Stripping Voltammetry Using Ti(N,C) Working Electrodes
p.168

Aerogel Catalysts
p.174

HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 65Defect Detection in Ceramic Armor Using Phased...

Defect Detection in Ceramic Armor Using Phased Array Ultrasound

Abstract:

Monolithic ceramic tile is used as part of ceramic-composite armor. Rejection of individual tile that contain potential threat-defeat-reducing ―defects‖ must be accomplished in a fast and cost-effective manner. Water-immersion phased-array ultrasound using 10 MHz 128-element transducers sequenced at 32-elements has been demonstrated to quickly scan and detect 25-50 um known inclusion-type defects in individual 25 mm thick SiC tile. Further, use of similar phasedarray transducers and similar transducer-element activation sequences, has shown detection of intentional internal defects in tests of 40 cm square by 50 mm thick, multi-layered composite ceramic-armor specimens. Large changes in acoustic velocities of the various layered materials causes focusing issues of the ultrasonic wave. The use of various digital signal processing methods can be used to overcome some of these issues. The results show that use of phased array ultrasound can reliably be used for defect detection in either monolithic or composite ceramic-armor. The technology and various results are presented.

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Periodical:

Advances in Science and Technology (Volume 65)

Pages:

143-152

DOI:

https://doi.org/10.4028/www.scientific.net/AST.65.143

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Online since:

October 2010

Authors:

William A. Ellingson, J. Scott Steckenrider, Thomas J. Meitzler

Keywords:

Armor, Nondestructive Evaulation, Ultrasound (US)

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References

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