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Abstract
Aiming to study the effect of drive plate with different surface topographies on the wear property of magnetorheological fluid (MRF), some specific experiments are carried out and analyzed in this paper. Firstly, experiment materials and test methods for MRF are elaborated, and four different surface topography drive plates are designed and manufactured. MRF test‐bed is built up to test the rheological properties of MRF. Moreover, the surface morphology of particles is taken using a scanning electron microscope (SEM). Finally, experimental results show that there are remarkable influences on tribological properties of carbonyl iron‐based MRF with different drive plates. Therefore, the drive plate with specific surface topography can meet the needs of different MRF transmission systems.
Highlights
As a kind of smart material that is sensitive to magnetic field, magnetorheological fluid (MRF) is a solid-liquid two-phase system formed by micron or submicron magnetic particles and additives disperse in a nonmagnetic carrier liquid [1, 2]
Carbonyl ironbased magnetorheological fluid with different physical parameters has different application properties, which has received extensive research by scholars. e corrosion process of carbonyl iron particles on magnetorheological behavior was investigated by Plachy et al, indicating that carbonyl iron particles were oxidized at fierce thermal oxidation at 500°C in the air and mild chemical oxidation in 0.05 M HCl [12]
A systematical study of the overall influence of carbon allotrope additives on performance, stability, and redispersibility of magnetorheological fluids was carried out by Cvek et al, showing that carbon nanotubes had a better effect on stability and redispersibility of MRF [14]
Summary
As a kind of smart material that is sensitive to magnetic field, magnetorheological fluid (MRF) is a solid-liquid two-phase system formed by micron or submicron magnetic particles and additives disperse in a nonmagnetic carrier liquid [1, 2]. When the external magnetic field is removed, the behavior of MRF reverts to the previous state within a few milliseconds Such phenomenon is called magnetorheological effect [3, 4]. E microscopic characteristics of a magnetorheological fluid (MRF) in a magnetic field was studied by Wang et al, and they indicated that the chain structure of the same MRF becomes more apparent as the magnetic field strength increases and, in the same external magnetic field, the chain structure becomes more apparent with an increase in the particle volume fraction [23]. MRF test-bed is used to study the effects of different surface topography on properties of carbonyl iron-based magnetorheological fluid. Test results show that there are remarkable influences on tribological properties of carbonyl iron-based MRF with different surface texture.
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