Abstract
Phased Ultrasonic Burst Thermography. Phased ultrasonic burst thermography is a new nondestructive technique originating from ultrasound lock-in thermography. It provides thermal wave imaging of defects by ultrasonic stimulation. Relatively short ultrasound bursts yield faster measurements and better reproducibility in relation to the well established lock-in method. The advantages of phase images remain valid: the recognition of defect depth and the suppression of temperature gradients. Application of phased ultrasonic burst thermography to typical defects of aircraft components and ceramic turbine blade coatings provide specific information on their nature.
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