Hydrodynamic and Magnetized Characteristics of MCF(Magnetic Compound Fluid).

邦雄, 島田; 豊久, 藤田; 英夫, 岡; 陽一, 赤上; 新一, 神山

doi:10.1299/kikaib.67.3034

Cited by 37 publications

(28 citation statements)

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“…Beside mechanical polishing methods, Gailly P. et al [9] applied the ion beam etching technique for the surface figure-improving of CVD SiC mirrors and experimentally elucidated the effects of ion beam etching conditions on the mirror surface error and roughness. By taking account of the respective advantages of mechanical polishing and ion beam etching, Kang N. et al [10] proposed a technique combining "classic lapping and polishing" and exhibits higher magnetic pressure and apparent viscosity under a magnetic field and a more stable distribution of particles, while maintaining a fluid-like behaviour [11] . The MCF slurry, a novel magnetic polishing liquid in which abrasive particles and α-cellulose fibre are blended into the MCF, is one of the engineering applications of the MCF [12] , and showed strong performance in constant contact-force and/or contact-free surface finishing of flat/3D-structure work-surfaces of metal, acrylic resin, optical glass and SiC ceramics under a static and/or dynamic magnetic field [13][14][15] .…”

Section: Introductionmentioning

confidence: 99%

Nano-precision Polishing of CVD SiC Using MCF (Magnetic Compound Fluid) Slurry

Wu¹,

Wang²,

Fujimoto³

et al. 2014

Journal of The Korean Society of Manufacturing Technology Engin

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Article history:CVD SiC is a perfect material used for molds/dies in hot press molding of glass lens. In its fabrication process, nano-precision polishing is essential finally. For this purpose, a novel polishing method using MCF (Magnetic Compound Fluid) slurry is proposed. In this method, MCF slurry is supplied into a given gap between the workpiece and a MCF slurry carrier, and constrained within the polishing zone by magnetic forces from permanent magnet. In this paper, after an experimental rig used to actually realize the proposed method has been constructed, the fundamental polishing characteristics of CVD SiC such as the effects of process parameters including MCF slurry composition on worksurface roughness were experimentally investigated. As a result, nano-precision surface finish of CVD SiC was successfully attained with MCF slurry and the optimum process parameters for obtaining the smoothest work-surface were determined.

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Section: Introductionmentioning

confidence: 99%

Nano-precision Polishing of CVD SiC Using MCF (Magnetic Compound Fluid) Slurry

Wu¹,

Wang²,

Fujimoto³

et al. 2014

Journal of The Korean Society of Manufacturing Technology Engin

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“…In response to this need, Shimada has demonstrated experimentally the use of his developed intelligent fluid, a magnetic compound fluid (MCF) [1][2][3]. It was created by compounding the nm-size magnetite of magnetic fluid (MF) and the µm-size iron particles into a single solvent, thereby essentially producing a mixture of MF and magnet-rheological fluid (MRF).…”

Section: Introductionmentioning

confidence: 99%

Research on Magnetic Compound Fluid (MCF) Rubber as Material for Microwave Heating

Zheng

Shimada

2009

JMMP

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This report describes the application of magnetic compound fluid (MCF) rubber as a material for microwave heating. MCF rubber is one of several new composite materials utilizing MCF as a newly developed magnetic responsive fluid developed by Shimada. The temperature of water in a PP container enveloped by MCF rubber in a microwave oven was measured at various mass concentrations of magnetic particles in the MCF rubber. The measurements were compared to those of MCF rubber in a microwave oven. The results showed an optimum mass concentration in relationship to the increase or decrease of the water temperature. At less than about 50 wt% and more than about 90 wt% of the magnetic particles in the MCF rubber, changes in the water temperature were small but those of the MCF rubber were large. However, in the range of about 60 -80 wt%, changes in the water temperature were large but those of the MCF rubber were small. To explain the experimental data, we derived a simple microwave heating theory and measured experimental data for the complex permittivity and permeability of the MCF rubber. This could partly explain the experimental results qualitatively. We also found in the present study that iron particles are better for the MCF rubber in microwave heating than copper or nickel particles. In conclusion, the MCF rubber is a useful material for microwave heating in a microwave oven.

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“…However, MF and MRF have respective disadvantages when they are applied to surface finishing. In order to overcome their disadvantages and make use of their respective advantages, one of authors developed a magnetic compound fluid (MCF) by mixing MF and MRF having the same base solvent (Shimada et al, 2001). Then in our successive works, a new kind of magnetic abrasive compound named MCF polishing liquid was proposed by blending abrasive particles and ␣-cellulose fiber into MCF, and it was confirmed experimentally that MCF polishing liquid performed well in constant contact-force polishing (Shimada et al, 2003;Wu et al, 2005;Jiang et al, 2006).…”

Section: Introductionmentioning

confidence: 99%