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RESEARCH PRODUCT

Nanoparticle dispersion in liquid metals by electromagnetically induced acoustic cavitation

I. GrantsI. GrantsImants KaldreToms BeinertsMatīss KalvānsAndris BojarevicsMikus MilgrāvisGunter Gerbeth

subject

010302 applied physicsMaterials sciencePolymers and Plasticsbusiness.industryPhysics::Medical PhysicsUltrasoundMetallurgyMetals and AlloysNanoparticle02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesElectronic Optical and Magnetic MaterialsMagnetic fieldPhysics::Fluid DynamicsAgglomerateCavitation0103 physical sciencesCeramics and CompositesUltrasonic sensorMagnesium alloyComposite material0210 nano-technologybusinessMicroscale chemistry

description

Abstract Aim of this study is to investigate experimentally the effect of magnetically induced cavitation applied for the purpose of nanoparticle dispersion in liquid metals. The oscillating magnetic force due to the azimuthal induction currents and the axial magnetic field excites power ultrasound in the sample. If the fields are sufficiently high then it is possible to achieve the acoustic cavitation threshold in liquid metals. Cavitation bubble collapses are known to create microscale jets with a potential to break nanoparticle agglomerates and disperse them. The samples are solidified under the contactless ultrasonic treatment and later analyzed by electron microscopy and energy-dispersive X-ray spectroscopy (EDX). It is observed that SiC nanoparticles are dispersed in an aluminum magnesium alloy, whereas in tin the same particles remain agglomerated in micron-sized clusters despite a more intense cavitation.

yearjournalcountryeditionlanguage
2016-10-01Acta Materialia
https://doi.org/10.1016/j.actamat.2016.07.045