Catherine Tonry
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View article: High-speed imaging of CNT deagglomeration in aqueous solution with surfactant
High-speed imaging of CNT deagglomeration in aqueous solution with surfactant Open
View article: Controlling solute channel formation using magnetic fields
Controlling solute channel formation using magnetic fields Open
Solute channel formation introduces compositional and microstructural variations in a range of processes, from metallic alloy solidification, to salt fingers in ocean and water reservoir flows. Applying an external magnetic field interacts…
View article: Modulating Meltpool Dynamics and Microstructure using Thermoelectric Magnetohydrodynamics in Additive Manufacturing
Modulating Meltpool Dynamics and Microstructure using Thermoelectric Magnetohydrodynamics in Additive Manufacturing Open
Meltpool modulation in Selective Laser Remelting Additive Manufacturing via an oscillating magnetic field generates Thermoelectric Magnetohydrodynamics (TEMHD) flow. Numerical predictions show that the resulting microstructure can be signi…
View article: Comparison of frequency domain and time domain methods for the numerical simulation of contactless ultrasonic cavitation
Comparison of frequency domain and time domain methods for the numerical simulation of contactless ultrasonic cavitation Open
View article: High-Speed Imaging of the Ultrasonic Deagglomeration of Carbon Nanotubes in Water
High-Speed Imaging of the Ultrasonic Deagglomeration of Carbon Nanotubes in Water Open
View article: Comparison of Frequency Domain and Time Domain Methods for the Numerical Simulation of Contactless Ultrasonic Cavitation
Comparison of Frequency Domain and Time Domain Methods for the Numerical Simulation of Contactless Ultrasonic Cavitation Open
View article: Enhancement of Mechanical Properties of Pure Aluminium through Contactless Melt Sonicating Treatment
Enhancement of Mechanical Properties of Pure Aluminium through Contactless Melt Sonicating Treatment Open
A new contactless ultrasonic sonotrode method was previously designed to provide cavitation conditions inside liquid metal. The oscillation of entrapped gas bubbles followed by their final collapse causes extreme pressure changes leading t…
View article: Contactless Ultrasonic Treatment in Direct Chill Casting
Contactless Ultrasonic Treatment in Direct Chill Casting Open
Uniformity of composition and grain refinement are desirable traits in the direct chill (DC) casting of non-ferrous alloy ingots. Ultrasonic treatment is a proven method for achieving grain refinement, with uniformity of composition achiev…
View article: Progress in the development of a contactless ultrasonic processing route for alloy grain refinement
Progress in the development of a contactless ultrasonic processing route for alloy grain refinement Open
A high frequency tuned electromagnetic (EM) induction coil can be used to induce ultrasonic pressure waves leading to gas cavitation in alloy melts. This is a useful ‘ contactless ’ approach compared to the usual immersed sonotrode techniq…
View article: Study of thermoelectric magnetohydrodynamic convection on solute redistribution during laser additive manufacturing
Study of thermoelectric magnetohydrodynamic convection on solute redistribution during laser additive manufacturing Open
Melt pools formed in laser additive manufacturing (AM) are subject to large thermal gradients, resulting in the formation of thermoelectric currents due to the Seebeck effect. When in the presence of an external magnetic field, a Lorentz f…
View article: Thermoelectric magnetohydrodynamic control of melt pool dynamics and microstructure evolution in additive manufacturing
Thermoelectric magnetohydrodynamic control of melt pool dynamics and microstructure evolution in additive manufacturing Open
Large thermal gradients in the melt pool from rapid heating followed by rapid cooling in metal additive manufacturing generate large thermoelectric currents. Applying an external magnetic field to the process introduces fluid flow through …
View article: Contactless Ultrasonic Cavitation in Alloy Melts
Contactless Ultrasonic Cavitation in Alloy Melts Open
A high frequency tuned electromagnetic induction coil is used to induce ultrasonic pressure waves leading to cavitation in alloy melts. This presents an alternative ‘contactless’ approach to conventional immersed probe techniques. The meth…
View article: Fabrication of hollow polymer microstructures using dielectric and capillary forces
Fabrication of hollow polymer microstructures using dielectric and capillary forces Open
Electric Field Assisted Capillarity is a novel one-step process suitable for the fabrication of hollow polymer microstructures. The process, demonstrated to work experimentally on a microscale using Polydimethylsiloxane (PDMS), makes use o…