scholarly journals The field-dependent rheological properties of plate-like carbonyl iron particle-based magnetorheological elastomers

2019 ◽  
Vol 12 ◽  
pp. 2146-2154 ◽  
Author(s):  
Norhiwani Hapipi ◽  
Siti Aishah Abdul Aziz ◽  
Saiful Amri Mazlan ◽  
Ubaidillah ◽  
Seung Bok Choi ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Carbonyl Iron ◽  
Iron Particle ◽  
Magnetorheological Elastomers ◽  
Carbonyl Iron Particle ◽  
Field Dependent

scholarly journals The field-dependent viscoelastic and transient responses of plate-like carbonyl iron particle based magnetorheological greases

2019 ◽  
Vol 30 (5) ◽  
pp. 788-797 ◽  
Author(s):  
Norzilawati Mohamad ◽  
Saiful Amri Mazlan ◽  
Ubaidillah ◽  
Seung-Bok Choi ◽  
Fitrian Imaduddin ◽  
...  
Keyword(s):  
Carbonyl Iron ◽  
Weight Fraction ◽  
Iron Particle ◽  
Milling Process ◽  
Iron Particles ◽  
Carbonyl Iron Particle ◽  
Dynamic Rheological Properties ◽  
Field Dependent ◽  
Surface Diameter ◽  
Surface Microstructures

The field-dependent viscoelastic and transient behaviours of plate-like-carbonyl-iron-particle-based magnetorheological greases are experimentally investigated in this study. The plate-like carbonyl-iron particles are made from spherical carbonyl-iron particles through a milling process using a rotary ball mill. Several samples of magnetorheological greases consisting of different weight percentages of plate-like carbonyl-iron particles are prepared. The surface microstructures and distributions of the plate-like carbonyl-iron particles in the grease are observed using various types of microscopic investigations. Subsequently, the viscoelastic and transient (dynamic) rheological properties of the plate-like carbonyl-iron particles are investigated using a commercial rheometer. The spherical carbonyl-iron particles are transformed into the flattened plate-like carbonyl-iron particles with a larger surface diameter. It is shown that the viscoelastic properties such as storage modulus and response time of the plate-like carbonyl-iron particles significantly depend on the shape and particle weight fraction. The findings reveal that the shape of the carbonyl-iron particles has a significant effect on the field-dependent behaviours. Thus, the results presented in this work provide very useful scientific contributions for devising appropriate applications utilizing the plate-like-carbonyl-iron-particle-based magnetorheological greases.

Influence of carbonyl iron particle coating with silica on the properties of magnetorheological elastomers

2016 ◽  
Vol 25 (10) ◽  
pp. 105030 ◽  
Author(s):  
P Małecki ◽  
M Królewicz ◽  
F Hiptmair ◽  
J Krzak ◽  
J Kaleta ◽  
...  
Keyword(s):  
Carbonyl Iron ◽  
Iron Particle ◽  
Magnetorheological Elastomers ◽  
Carbonyl Iron Particle ◽  
Particle Coating

scholarly journals Effects of Silicone Oil Viscosity and Carbonyl Iron Particle Weight Fraction and Size on Yield Stress for Magnetorheological Grease Based on a New Preparation Technique

Materials ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 1778 ◽  
Author(s):  
Kejie Wang ◽  
Xiaomin Dong ◽  
Junli Li ◽  
Kaiyuan Shi ◽  
Keju Li
Keyword(s):  
Yield Stress ◽  
Carbonyl Iron ◽  
Silicone Oil ◽  
Weight Fraction ◽  
Iron Particle ◽  
Preparation Technique ◽  
Oil Viscosity ◽  
Dynamic Yield Stress ◽  
Carbonyl Iron Particle ◽  
Dynamic Yield

This paper investigated the effects of silicone oil viscosity (SOV) and carbonyl iron particle (CIP) weight fraction and size on dynamic yield stress for magnetorheological (MR) grease. The MR grease samples were prepared using orthogonal array L9 on the basis of a new preparation technology. The shear rheological tests were undertaken using a rotational shear rheometer and yield stress was obtained based on the Bingham fluid model. It was found that CIP fractions ranging from 65 wt% to 75 wt% and SOV varying from 50 m2·s−1 to 1000 m2·s−1 significantly affect the magnetic field-dependent yield stress of MR grease, but the CIPs with sizes of 3.2–3.9 μm hardly had any influence based on the analysis of variance (ANOVA). In addition, the yield stress of MR grease mainly depended on the CIP fraction and SOV by comparing their percent contribution (PC). It was further confirmed that there were positive effects of CIP fraction and SOV on yield stress through response surface analysis (RSA). The results showed a high dynamic yield stress. It indicated that MR grease is an intelligent material candidate which can be applied to many different areas requiring high field-induced rheological capabilities without flow for suspension. Moreover, based upon the multivariate regression equation, a constitutive model was developed to express the function of the yield stress as the SOV and fraction of CIPs under the application of magnetic fields.

Performance of Magnetorheological Elastomer Based Silicone/SAIB

2018 ◽  
Vol 772 ◽  
pp. 61-65
Author(s):  
Muntaz Hana Ahmad Khairi ◽  
Saiful Amri Mazlan ◽  
Ubaidillah ◽  
Siti Aishah Abdul Aziz ◽  
Norhiwani Mohd Hapipi
Keyword(s):  
Rheological Properties ◽  
Silicone Rubber ◽  
Carbonyl Iron ◽  
Excitation Frequency ◽  
Rubber Matrix ◽  
Iron Particles ◽  
Magnetorheological Elastomer ◽  
Magnetorheological Elastomers ◽  
Mr Effect ◽  
Strain Dependent

This study introduces a sucrose acetate isobutyrate (SAIB) as an additive of magnetorheological elastomers (MREs) to be added in silicone rubber matrix and carbonyl iron particles (CIPs) as their filler. The CIPs were fixed at 60 wt% and two types of MREs sample were fabricated which are isotropic and anisotropic. Rheological properties related to shear storage modulus were measured using a rheometer (MCR 302, Anton Paar). The experimental results demonstrated that the magnetorheological (MR) effect of anisotropic MREs-based Silicone/SAIB was 126 % as compared to isotropic MREs-based Silicone/SAIB, 64%. The fabricated MREs samples were frequency and strain dependent. The relative MR effect for both samples showed decreasing trend with the increment of strain amplitude and excitation frequency.

Zirconia-coated carbonyl-iron-particle-based magnetorheological fluid for polishing optical glasses and ceramics

2009 ◽  
Vol 48 (35) ◽  
pp. 6797 ◽  
Author(s):  
Shai N. Shafrir ◽  
Henry J. Romanofsky ◽  
Michael Skarlinski ◽  
Mimi Wang ◽  
Chunlin Miao ◽  
...  
Keyword(s):  
Carbonyl Iron ◽  
Iron Particle ◽  
Magnetorheological Fluid ◽  
Optical Glasses ◽  
Carbonyl Iron Particle

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

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.

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

2016 ◽  
Vol 25 (9) ◽  
pp. 095025 ◽  
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

The Field-Dependent Rheological Properties of Magnetorheological Grease Based on Carbonyl-Iron-Particles

2016 ◽  
Vol 25 (9) ◽  
pp. 095043 ◽  
Author(s):  
N Mohamad ◽  
S A Mazlan ◽  
Ubaidillah ◽  
Seung-Bok Choi ◽  
M F M Nordin
Keyword(s):  
Rheological Properties ◽  
Carbonyl Iron ◽  
Iron Particles ◽  
Field Dependent
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