Effect of Magnetic Field on Sintering of Iron Powder Compact

Two types of carbonyl iron powders, (CIP's, BASF AG), the HS and HS-I (I = insulated, due a coating with phosphate), and two kinds of silica, one hydrophobic (Cab-O-Sil® TS610) and other hydrophilic (Cab-O-Sil® M5), were used to evaluate the influence of the surface treatment of the magnetic particle and the kind of fumed silica on the formulation of some magnetorheological suspensions (MRS). Oscillatory measurements at no field showed an evident difference between the silicas, but not a specific interaction with the phosphate coating on HSI. On the other hand, steady flow experiments also without magnetic field showed that the kind of silica and its specific interactions with the coating on iron powder drove the rheological behavior of the MRS on all region of the shear rate. Under magnetic field, the flow curves differences will be due to the iron particles and its magnetic properties, mainly on the region of higher shear rate.

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Study on Reliability of New Fixture Method for NOMEX Honeycomb

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.415-417.3 ◽

2011 ◽

Vol 415-417 ◽

pp. 3-13 ◽

Cited By ~ 1

Author(s):

Cheng Zhu Jin

Keyword(s):

Magnetic Field ◽

Iron Powder ◽

Strong Magnetic Field ◽

Magnetic Force ◽

Low Cost ◽

Cutting Parameters ◽

Milling Process ◽

Milling Force ◽

Experiment Method ◽

Nomex Honeycomb

A new fixturing method, based on the principles of strong magnetic field and friction-clamping, is presented. The method can completely constrain the bottom of the NOMEX honeycomb with the friction force between iron powder and honeycomb walls, honeycomb and clamping plane produced from the gravity of the iron powder injected into the honeycomb and the magnetic force produced by the additional strong magnetic field. To analyze the reliability of the method, firstly, the milling force and its distribution are predicted with FEM and experiment method under the condition of different cutting parameters. Then, the fixturing strength and the milling force are analyzed comparatively in the low-reliability and -stability zone during the milling process. It is proved by experiments and analysis that the fixturing method has the advantages of low cost, being easy to use, and no pollution.

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Influence of magnetic field on viscosity of suspensions based on dusted iron powder

Journal of Engineering Physics and Thermophysics ◽

10.1007/s10891-006-0215-x ◽

2006 ◽

Vol 79 (6) ◽

pp. 1134-1138 ◽

Cited By ~ 1

Author(s):

Yu. M. Rychkov ◽

Yu. G. Polyagoshko ◽

A. V. Esipok

Keyword(s):

Magnetic Field ◽

Iron Powder

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Experimental Research on the Characteristics of the Magnetic Compound Fluid by Grinding Solar Wafers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1055.63 ◽

2014 ◽

Vol 1055 ◽

pp. 63-67

Author(s):

Zhi Chun Chen ◽

Bo Wu ◽

Wei Fan ◽

Ya Li Zhou

Keyword(s):

Magnetic Field ◽

Iron Powder ◽

Experimental Research ◽

Process Parameters ◽

Magnetic Fluid ◽

Microscopic Appearance ◽

Abrasive Grains

This paper studies the grinding characteristics of magnetic compound fluid by conducting large amounts of experiments. Magnetic compound fluid (MCF) is formed by mixing abrasive grains, α-cellulose, iron powder and Magnetic-Fluid together according to a certain proportion. The experiments are conducted to test the effect of process parameters (such as different period of time, various speed of main axle and fluctuating magnetic field) on grinding results using Solar wafers. The results showed that the grinding surface of solar wafers is within Ra0.1 after 3 minutes and the microscopic appearance of the surface is flat and free of burns phenomenon.

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The investigation of cold sintering mechanism of iron powder compact

High Pressure Research ◽

10.1080/08957959008246281 ◽

1990 ◽

Vol 5 (1-6) ◽

pp. 862-864

Author(s):

D. C. Stefanovic ◽

M. Djuricic ◽

M. Dragojlovic ◽

M. M. Ristic

Keyword(s):

Iron Powder ◽

Powder Compact ◽

Sintering Mechanism

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Anisotropy in toughness and dimensional change of iron powder compact.

Journal of the Japan Society of Powder and Powder Metallurgy ◽

10.2497/jjspm.33.367 ◽

1986 ◽

Vol 33 (7) ◽

pp. 367-372

Author(s):

Hidenori Kuroki

Keyword(s):

Iron Powder ◽

Powder Compact ◽

Dimensional Change

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Magnetic-Field-Assisted Finishing with Axial Vibration -Deburring on Internal Holes and Internal Finishing of Pipes with Rectangular Cross-Sections-

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.329.261 ◽

2007 ◽

Vol 329 ◽

pp. 261-266 ◽

Cited By ~ 1

Author(s):

Hideki Fujita ◽

Takeo Shinmura ◽

H. Yamaguchi

Keyword(s):

Magnetic Field ◽

Iron Powder ◽

Cross Sections ◽

Magnetic Field Effects ◽

Axial Vibration ◽

Field Effects ◽

Magnetic Poles ◽

The Magnetic Field

In the magnetic-field-assisted finishing, grinding powder mixed with iron powder is placed inside a part and vibration is applied to the part under magnetic field. Effects of the process on deburring of step-wise holes and internal roughness of brass square pipes were examined. Rotation was given to the pipes with step-wise holes, while the magnetic poles were vibrated. Axial vibration was given to the square pipes, while the magnetic poles were fixed. Burr formed by drilling at internal edges was effectively removed by the process. Inside roughness of the square pipe was successfully finished to 0.023 μm Ra.

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