Synthesis of Magnetorheological Fluid using Electrolytic Carbonyl Iron Powder for Enhanced Stability

Abstract

Magnetorheological (MR) fluids is synthesized using micron-sized electrolytic carbonyl iron (CI) particles and vacuum grease as additive and their rheological behaviours were investigated in terms of particle alignment by controlling magnetic field, also the effect of surfactant Triton X100 was investigated. The overall rheological characteristics and sedimentation characteristics of the synthesised samples of MR fluids were compared with Lord 132DR MR fluid using rotational Rheometer which has magnetic cell. It was establish that combination of electrolytic CI powder with vacuum grease and Triton X-100 improves the stability of the fluid by reducing sedimentation

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

“…In general, the conditions of good magnetic particle for MR materials require high saturation magnetization, low remnant magnetization, and high, short-term inter-particle attraction. Of the many magnetically permeable particles, the CI which was discovered by BASF in 1925 produced by thermal decomposition of iron pentacarbonyl (Fe(CO) 5 ) is the most studied and used as MR particle [ 50 , 51 , 52 , 53 ]. The reason is that as one of the soft-magnetics, it has the advantage of high saturation magnetization, easy magnetization and demagnetization, and no magnetic hysteresis.…”

Magnetorheological fluid based on amorphous Fe-Si-B alloy magnetic particles

“…Generally used particulate materials for MRF are magnetically ferromagnetic or paramagnetic particles, typically greater than 0.1 μm in diameter (Yu et al, 2016). Carbonyl iron (CI) soft magnetic particles are popularly selected as dispersed particles for MRF owing to easy preparation, relatively cheap price, and good biological compatibility (Jiang et al, 2010; Jinaga and Jagadeesha, 2019; Zhang et al, 2014). However, CI magnetic particles exhibit low magnetic energy-density per unit volume, which limits the magnetorheological response of the MRF under an external magnetic field.…”