Ferrofluid and bolt in a magnetic field

Numéro d’image : 11628295
Ferrofluid and bolt in a magnetic field
Ferrofluid coating a steel bolt in a watchglass in the magnetic field from a neodymium magnet (not seen). The peaks formed in the ferrofluid are due to the magnetic field. Ferrofluids are colloidal liquids consisting of nanoscale ferromagnetic,or ferrimagnetic,particles (such as iron or an iron oxide) suspended in a fluid,usually an oil. Each tiny particle is thoroughly coated with a surfactant to inhibit clumping. One application of ferrofluids is to keep dust off the drive shafts of magnetic disk drives,which they do by creating a liquid seal held in place by magnetic fields
Licence : Droits gérés
Crédit: Science Photo Library
Taille de l’image : 4252 px × 4252 px
Model Release : Non requis
Property Release : Non requis
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