Influence of different fumed silica as thixotropic additive on carbonyl particles magnetorheological fluids for sedimentation effects

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dc.contributor.authorAruna, M.N.
dc.contributor.authorRahman, M.R.
dc.contributor.authorJoladarashi, S.
dc.contributor.authorKumar, H.
dc.contributor.authorBhat Panemangalore, D.B.
dc.date.accessioned2026-02-05T09:26:59Z
dc.date.issued2021
dc.description.abstractThe present work reports the influence of different types of surface area, hydrophobic, and hydrophilic fumed silica mixed in silicone oil as a thixotropic additive on carbonyl particles based magnetorheological fluids (MRFs) were prepared. Scanning electron microscopy analysis confirms the fumed silica particles attached to the surfaces of CIPs. The vibrating sample magnetometer result shows the MRF4 and 5 have a better magnetic saturation value of 30.12 emu/gm and 40.12 emu/gm, respectively. The experimental rheological flow curve behaviours are investigated using the magnetorheometer. The Herschel–Bulkley rheological model is found to be in good agreement with the experimental curves and suggested shear thinning property is observed. The results showed that the hydrophilic silica with larger surface area type presented (i.e.MRF 4 and 5) better magnetorheological fluid characteristics in terms of shear stress, with a high value of dynamic yield stress, and have much-improved sedimentation ratio up to seven days. © 2021 Elsevier B.V.
dc.identifier.citationJournal of Magnetism and Magnetic Materials, 2021, 529, , pp. -
dc.identifier.issn3048853
dc.identifier.urihttps://doi.org/10.1016/j.jmmm.2021.167910
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/23185
dc.publisherElsevier B.V.
dc.subjectAdditives
dc.subjectHydrophilicity
dc.subjectScanning electron microscopy
dc.subjectSedimentation
dc.subjectShear stress
dc.subjectShear thinning
dc.subjectSilica
dc.subjectSilicones
dc.subjectYield stress
dc.subjectCarbonyl iron particles
dc.subjectFumed silicas
dc.subjectHerschel-Bulkley model
dc.subjectHydrophobic and hydrophilic
dc.subjectMagneto-rheological
dc.subjectScanning electrons
dc.subjectSedimentation effects
dc.subjectSilicone oil
dc.subjectSurface area
dc.subject[carbonyl
dc.subjectMagnetorheological fluids
dc.titleInfluence of different fumed silica as thixotropic additive on carbonyl particles magnetorheological fluids for sedimentation effects

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