Nanoparticle Dispersion in Liquid Metals by Electromagnetically Induced Acoustic Cavitation
Acta Materialia 2016
Imants Kaldre, Andris Bojarevics, Ilmārs Grants, Toms Beinerts, Mikus Milgravis, Gunter Gerbeth

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.


Atslēgas vārdi
Cavitation | High magnetic field | Metal matrix composites (MMCs) | Nanoparticles | Power ultrasound
DOI
10.1016/j.actamat.2016.07.045
Hipersaite
http://www.sciencedirect.com/science/article/pii/S1359645416305535

Kaldre, I., Bojarevics, A., Grants, I., Beinerts, T., Milgravis, M., Gerbeth, G. Nanoparticle Dispersion in Liquid Metals by Electromagnetically Induced Acoustic Cavitation. Acta Materialia, 2016, Vol.118, 253.-259.lpp. ISSN 1359-6454. Pieejams: doi:10.1016/j.actamat.2016.07.045

Publikācijas valoda
English (en)
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