Corrosion Resistant Zirconia Coated Carbonyl Iron Particle-Based Magnetorheological Fluid

2010 ◽  
Author(s):  
Shai Shafrir ◽  
Henry J. Romanofsky ◽  
Michael Skarlinski ◽  
Mimi Wang ◽  
Chunlin Miao ◽  
...  
Keyword(s):  
Carbonyl Iron ◽  
Iron Particle ◽  
Magnetorheological Fluid ◽  
Corrosion Resistant ◽  
Carbonyl Iron Particle

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

scholarly journals Properties of plate-like carbonyl iron particle for magnetorheological fluid

2016 ◽  
Vol 776 ◽  
pp. 012033 ◽  
Author(s):  
S. T. Shilan ◽  
S. A. Mazlan ◽  
M. H. A. Khairi ◽  
Ubaidillah
Keyword(s):  
Carbonyl Iron ◽  
Iron Particle ◽  
Magnetorheological Fluid ◽  
Carbonyl Iron Particle

Zirconia coated carbonyl iron particle-based magnetorheological fluid for polishing

2009 ◽  
Author(s):  
Shai N. Shafrir ◽  
Henry J. Romanofsky ◽  
Michael Skarlinski ◽  
Mimi Wang ◽  
Chunlin Miao ◽  
...  
Keyword(s):  
Carbonyl Iron ◽  
Iron Particle ◽  
Magnetorheological Fluid ◽  
Carbonyl Iron Particle

scholarly journals The Influence of Additives on the Rheological and Sedimentary Properties of Magnetorheological Fluid

2021 ◽  
Vol 7 ◽  
Author(s):  
Xiangcheng Zhang ◽  
Xiaotong Liu ◽  
Xiaohui Ruan ◽  
Jun Zhao ◽  
Xinglong Gong
Keyword(s):  
Shear Stress ◽  
Magnetic Flux ◽  
Stearic Acid ◽  
Flux Density ◽  
Carbonyl Iron ◽  
Mass Fraction ◽  
Iron Particle ◽  
Magnetorheological Fluid ◽  
Magnetic Flux Density ◽  
Carbonyl Iron Particle

In this research, the influence of additives on the rheological and sedimentary properties of the magnetorheological fluid (MRF) was tested and analyzed. The additives were stearic acid, sodium dodecyl sulfate (SDS), and their mixture, respectively. The MRF was composed of carbonyl iron particle, silicone oil, liquid paraffin, graphite particle, bentonite, stearic acid, and SDS. The results indicated that the rheological properties of the MRF were mainly influenced by the mass fraction of carbonyl iron particle. When the mass fractions of carbonyl iron particle and additive were the same, the shear stress of MRF with stearic acid was larger than that of MRF with SDS, and the maximum increment was 73.81%. When the mass fraction of carbonyl iron particle was 40–50%, the shear stress of MRF increased firstly and then decreased with the increase of the external magnetic flux density. When the mass fraction of carbonyl iron particle was 60–70%, the shear stress of MRF increased firstly and then was stable with the increase of the external magnetic flux density. The results indicated that the sedimentary property of MRF with the mixture was better than that of MRF with the stearic acid and SDS. The settling rate of MRF with the mixture increased 91.53% compared to other additives.

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.

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.

Reflection loss mechanism of single layer absorber for flake-shaped carbonyl-iron particle composite

2012 ◽  
Vol 112 (10) ◽  
pp. 104903 ◽  
Author(s):  
Tao Wang ◽  
Rui Han ◽  
Guoguo Tan ◽  
Jianqiang Wei ◽  
Liang Qiao ◽  
...  
Keyword(s):  
Reflection Loss ◽  
Carbonyl Iron ◽  
Single Layer ◽  
Iron Particle ◽  
Loss Mechanism ◽  
Particle Composite ◽  
Carbonyl Iron Particle
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