Fully Integrated Materials Framework for Enabling the Wireless Detection of Micro-defects in Aging and Battle-worn Structures.

摘要

We present second-year results from a two-year study on a novel, inexpensive, passive, wireless solution for performing nondestructive evaluation on the structural integrity of aging aircraft. Electro-mechanical resonant phenomena in barium strontium titanate thin films have been thoroughly investigated using microwave reflectivity spectroscopy. Additionally, piezoelectric lead zirconate titanate thin films have been electrically characterized in terms of capacitance and dielectric loss tangent. Finally, we have explored the integration of such devices into a detection system involving piezoelectric wafer active transducers.