High temperature integrated ultrasonic shear and longitudinal wave probes

Integrated and Flexible High Temperature Ultrasonic Transducers

Thick (> 40μm) ceramic films as piezoelectric ultrasonic transducers (UTs) have been successfully deposited on metallic and graphite/epoxy composite substrates by a spray technique. The characteristics of these UTs are that they (1) can be integrated directly onto the desired planar or curved substrates; (2) may not need couplant; (3) can operate in the transmission and pulse/echo modes with a ...

High-Order Harmonic-Wave Generation of Ultrasonic Shear Waves

The high-order harmonic-wave generation of ultrasonic shear waves has not yet been studied. We generated high-order shear harmonic waves and studied them in terms of the nonlinear wave mechanism associated with strain waves. When the shear waves propagated through highly dissipative MnCu20Ni5Fe2, TiNi, and Sn-3Al specimens and were reflected from the far side of the specimen, we observed high-o...

High Temperature Integrated and Flexible Ultrasonic Transducers for NDT

Integrated (IUTs) and flexible ultrasonic transducers (FUTs) are presented for NDT at high temperatures. These transducers are made of sol-gel sprayed piezoelectric thick (> 40μm) ceramic films. The ceramic materials are lead-zirconate-titanate, bismuth titanate and lithium niobate which are for thickness measurement up to 150°C, 400°C and 800°C, respectively. The IUT can be also deposited onto...

Ultrasonic shear wave properties of soft tissues and tissuelike materials.

Determinations of shear wave speeds of sound and attenuation coefficients are reported for soft tissues, a silicone rubber reference material, and a gel used in manufacturing ultrasonically tissue-mimicking materials. Fresh bovine tissues were investigated, including calfskin, liver, cardiac muscle, and striated muscle. Because of the very large shear wave attenuation coefficients, reasonably a...

Compressional and shear wave velocities of Fe2SiO4 spinel at high pressure and high temperature