Effect of octahedral typed iron oxide particles on magnetorheological behavior of carbonyl iron dispersion
| Autor: | Hyo Seung Jung, J. Roupec, Hyoung Jin Choi, Zbynek Strecker, Seung Hyuk Kwon |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Rheometer Iron oxide 02 engineering and technology Dynamic mechanical analysis 021001 nanoscience & nanotechnology 01 natural sciences Suspension (chemistry) chemistry.chemical_compound Colloid and Surface Chemistry Carbonyl iron chemistry Rheology Chemical engineering 0103 physical sciences Magnetorheological fluid 0210 nano-technology Magnetite |
| Zdroj: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 555:685-690 |
| ISSN: | 0927-7757 |
| Popis: | To enhance suspension stability and magnetorheological (MR) effect of carbonyl iron (CI)-based MR fluids, octahedral-shaped magnetite particles were synthesized by a hydrothermal method in an autoclave and then adopted as an additive for soft-magnetic CI-based MR suspensions. Two different MR suspensions comprised of the same CI particles with a 70% weight fraction were prepared; one contained an additional 1 wt% octahedral magnetite according to the carrier fluid weight. The MR characteristics of the two MR suspensions with and without the octahedral-typed magnetite nanoparticles were tested using a rotation-typed rheometer attached with a magnetic field strength generator. The sedimentation profile of the MR suspension with and without the additive was also analyzed. The shear viscosity, shear stress, yield stress, and storage modulus from rheological tests were enhanced by the magnetic additive. |
| Databáze: | OpenAIRE |
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