Influence of Different Gradation Carbonyl Iron Particles on the Properties of Magneto-Rheological Fluids

In this study, a magneto-rheological fluid dispersed by silica-coated iron was developed and its properties such as fluid viscosity (shear stress or shear rate) and abrasion were investigated. The metallic iron coated by silica dispersed in magneto-rheological fluid was prepared by H 2 reducing of precipitated magnetite ( Fe 3 O 4). Then, the magneto-rheological fluid (MR fluid) for the seal was prepared with silica-coated iron or carbonyl iron (HQ type; diameter of 1.6-1.9 10-6m) and two solvent oils i.e. silicon oil (SH200cv, 10000cSt) and CVT oil (T-CVTF, automobile transmission oil). It was observed that the MR fluid viscosity of CVT oil with HQ particles is lower in every fluid condition. Furthermore, the surface roughness of polyvinyl plate after abrasion test for MR fluid with silica coated iron and CVT oil as solvent was higher compared to the other types of MR fluids. The results indicated that carbonyl iron (spherical particles) and silica-coated iron particles dispersed in silicon oil are feasible to be used where the low abrasion in mechanics is required.

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Influence of Different Gradation Carbonyl Iron Particles on the Properties of Magneto-Rheological Fluids

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.452-453.623 ◽

2012 ◽

Vol 452-453 ◽

pp. 623-627

Author(s):

Cheng Bin Du ◽

Guo Jun Yu ◽

Zhi Wei Gong

Keyword(s):

Mechanical Properties ◽

Particle Size ◽

Shear Stress ◽

Single Particle ◽

Carbonyl Iron ◽

Iron Particle ◽

Iron Particles ◽

Carbonyl Iron Particle ◽

Magneto Rheological ◽

Multiple Particle

The influence of carbonyl iron particles sizes on the properties of magneto-rheological fluids (MRFs) were studied. Different-sized carbonyl iron magnetic particles were prepared by ball milling with different milling times. On this basis, different particle MRF were prepared The off-state viscosity and the shear stress of the above MRFs were characterised and studied by an advanced rotational rheometer system. The test results show that the off-state viscosity and the shear stress of single-particle MRFs were enhanced with increasing average carbonyl iron particle size at a constant magnetic field. The shear stresses of MRFs containing two or three different particle sizes were significantly improved compared with the MRFs containing only a single particle size. At a reasonable level of medium and small size carbonyl iron particle spread throughout the structure of the multiple-particle MRFs, the defects in the chain structure were remedied when a chain reaction occurred, and the mechanical properties of MRFs were enhanced. Meanwhile, increased mass fractions of the small size carbonyl iron particle resulted in a reduction in overall average particle size of MRFs, and the mechanical properties of MRFs were also reduced. The mechanical properties of multiple-particle MRFs were observed to be strongly dependent on the size and mass fraction of the medium and small carbonyl iron particles.

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A comparison of field-dependent rheological properties between spherical and plate-like carbonyl iron particles-based magneto-rheological fluids

Smart Materials and Structures ◽

10.1088/0964-1726/25/9/095025 ◽

2016 ◽

Vol 25 (9) ◽

pp. 095025 ◽

Cited By ~ 22

Author(s):

Salihah Tan Shilan ◽

Saiful Amri Mazlan ◽

Yasushi Ido ◽

Abdollah Hajalilou ◽

Balachandran Jeyadevan ◽

...

Keyword(s):

Rheological Properties ◽

Carbonyl Iron ◽

Iron Particles ◽

Field Dependent ◽

Magneto Rheological

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Study of the Physical Properties of Carbonyl Iron Particles-Oriented Magneto-Rheological Elastomer

Asian Journal of Chemistry ◽

10.14233/ajchem.2013.f11 ◽

2013 ◽

Vol 25 (8) ◽

pp. 5171-5175 ◽

Cited By ~ 2

Author(s):

J.S. Seo ◽

M.S. Kim ◽

K.M. Yang ◽

J.H. Lee ◽

K.H. Chung

Keyword(s):

Physical Properties ◽

Carbonyl Iron ◽

Iron Particles ◽

Magneto Rheological

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Anisotropic magnetorheological elastomers with carbonyl iron particles in natural rubber and acrylonitrile butadiene rubber: A comparative study

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x20986995 ◽

2021 ◽

pp. 1045389X2098699

Author(s):

Md. Najib Alam ◽

Vineet Kumar ◽

Sang-Ryeoul Ryu ◽

Jungwook Choi ◽

Dong-Joo Lee

Keyword(s):

Elastic Modulus ◽

Natural Rubber ◽

Compressive Stress ◽

Carbonyl Iron ◽

Rubber Matrix ◽

Butadiene Rubber ◽

Iron Particles ◽

Acrylonitrile Butadiene Rubber ◽

Field Dependent ◽

Magneto Rheological

This work examines magneto-rheological elastomers (MREs) based on isotropic and anisotropic distribution of carbonyl iron particles (CIP) in natural rubber (NR) and acrylonitrile butadiene rubber (NBR). Measurements of the compressive mechanical properties were done to determine the isotropic and anisotropic properties of the MREs. Scanning electron microscopy (SEM) and optical microscopy were employed to study the CIP filler mixing behavior in the rubber matrix and orientation of particles in an anisotropic state. CIP-NBR composites show higher ultimate compressive stress in both isotropic and anisotropic states than NR-based composites. NBR-based composites show positive increases in both the elastic modulus and compressive stress at higher deformation when changing from isotropic to anisotropic, whereas NR-based composites show a positive increase in the elastic modulus and a decrease in the compressive stress. Elastic modulus measurements of anisotropic composites under a magnetic field suggest that NBR composites have much better field-dependent magnetic properties than NR composites. Anti-stress-relaxation measurements indicate that NBR composites have better magnetic effect than NR composites. The better performance of NBR-based anisotropic composites in field-dependent and independent behaviors might be due to better filler distribution, a greater number of chain-like filler structures, and less aggregation of the chain-like filler strands. The MREs based on NBR could be more useful than NR for wide range of magneto rheological applications.

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Morphological Analysis of Unstructured and Prestructured Magneto-rheological Elastomer

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2021.39216 ◽

2021 ◽

Vol 9 (12) ◽

pp. 153-159

Author(s):

B. B. Waghode

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Magnetic Flux ◽

Carbonyl Iron ◽

Morphological Analysis ◽

Morphological Characteristics ◽

Smart Material ◽

Iron Particles ◽

Magneto Rheological ◽

Scanning Electron

Abstract: By providing or not put on a magnetic flux, a magneto rheological (MR) elastomer becomes a very powerful and advanced smart material that could be twisted and responded hurriedly in relations of mechanical strength. They are elastomer materials with embedded iron elements in an elastomer environment. Isotropic(unstructured) and anisotropic(prestructured) MR elastomers are categorized built on the submission of a magnetic flux during in the fabrication process. The scattering of magnetizable elements in the medium of an elastomer is well defined and arranged by kind. Scanning Electron Microscopy(SEM) had revealed their shape. They should be employed in a variability of solicitations payable to their improved morphological characteristics, such as pulsation absorbers, isolators, seismic devices, and so on. Keywords: Smart material, magneto rheological elastomer, carbonyl iron particles, morphology, scanning electron microscopy

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