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Synthesis, characterization and magnetorheological properties of carbonyl iron suspension with superparamagnetic nanoparticles as an additive

Nikmat Leong, Siti Asma and Mohd. Samin, Pakharuddin and Idris, Ani and Mazlan, Saiful Amri and A. Rahman, Azura Hanis (2016) Synthesis, characterization and magnetorheological properties of carbonyl iron suspension with superparamagnetic nanoparticles as an additive. Smart Materials and Structures, 25 (2). ISSN 0964-1726

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Abstract

Magnetorheological (MR) fluids are suspensions of micron-sized particles dispersed in carrier fluid. Due to high density magnetic particles, MR fluids are facing the problem with the instability of the suspension caused by high settling rate. Recently, researches have been conducted on the advantages of using the mixture of magnetic nanoparticles and microparticles, called bidisperse MR fluids. However, even though the sedimentation stability is improved, there is a reduction in dynamic yield stress when the nanoparticle is introduced. In this work, the investigation of magnetic iron nanoparticles (γ-Fe2O3) as an additive to magnetic carbonyl iron (CI) suspension has been proposed so as to improve the sedimentation stability and redispersibility, but at the same time enhance the MR performance. The results indicated that the addition of nanoparticles reduced the sedimentation rate, improved redispersibility and enhanced the rheological performance of MR fluids as the particle fill the voids between the microparticles and strengthened the interparticle chains contributing to well-arranged particle structures

Item Type:Article
Uncontrolled Keywords:Iron, Magnetic bubbles, Magnetism, Magnetorheological fluids, Nanomagnetics, Nanoparticles, Sedimentation, Superparamagnetism, Suspensions (components), Synthesis (chemical), Yield stress, Carbonyl iron, Maghemite nanoparticle, Magnetic nano-particles, Magneto-rheological properties, Micron-sized particles, Sedimentation stability, Superparamagnetic nanoparticles, Superparamagnetics, Suspensions (fluids)
Subjects:T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions:Mechanical Engineering
ID Code:73955
Deposited By: Fahmi Mokhsen
Deposited On:22 Nov 2017 20:07
Last Modified:22 Nov 2017 20:07

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