Stabilized magnetorheological fluid compositions

Details Stabilized magnetorheological fluid compositions Stabilized magnetorheological fluid compositions

1998-10-26

2000-11-21

Koslow, C. Melissa

Compositions

Magnetic

Flaw detection or magnetic clutch

252 6251R, H01F 144

Patent

active

061498327

ABSTRACT:
Magnetorheological fluids containing carbonyl iron particles with surface hydroxyl groups and high specific surface area in combination with nonpolar vehicles such as polyalphaolefins and glycol esters can be formulated to resist particle separation under high separation force applications. When the nonpolar vehicle having a suitably high molecular weight is used, the fluids may be used at working temperatures of the order of 200.degree. C.

REFERENCES:
patent: 5667715 (1997-09-01), Foister

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