Terahertz Quantitative Nondestructive Evaluation of Failure Modes in Polymer-Coated Steel

  title={Terahertz Quantitative Nondestructive Evaluation of Failure Modes in Polymer-Coated Steel},
  author={Junliang Dong and Alexandre Locquet and David S. Citrin},
  journal={IEEE Journal of Selected Topics in Quantum Electronics},
Terahertz reflective imaging is applied to characterize the failure modes in a polymer coating on a steel plate. The coating was initially scratched, then after accelerated aging, several types of failure have occurred. In order to resolve the thin coating (~50 μm), terahertz frequency-wavelet domain deconvolution is implemented. With the deconvolved signals, the temporally overlapping echoes of the incident, roughly single-cycle terahertz pulse are clearly resolved, and three important failure… CONTINUE READING
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