Compositions – Magnetic – Flaw detection or magnetic clutch
Patent
1996-04-08
1997-09-16
Bonner, Melissa
Compositions
Magnetic
Flaw detection or magnetic clutch
252 6254, H01F 128
Patent
active
056677154
ABSTRACT:
A significant increase in the yield stress of a magnetorheological fluid can be obtained at a given volume fraction of solid magnetic particles by employing as the particulate component a mixture of a first component of relatively large particles and a second component of relatively small particles such that the mean diameter of the large particles is at least 5 times the mean diameter of the small particles. The mixture of large and small particles provides a substantial increase in the yield stress without an increase in the viscosity of the mixture in the absence of a magnetic field.
REFERENCES:
patent: 4957644 (1990-09-01), Price et al.
patent: 4992190 (1991-02-01), Shtarkman
patent: 5167850 (1992-12-01), Shtarkman
patent: 5276623 (1994-01-01), Wolfe
patent: 5277281 (1994-01-01), Carlson et al.
patent: 5284330 (1994-02-01), Carlson et al.
patent: 5354488 (1994-10-01), Shtarkman et al.
patent: 5382373 (1995-01-01), Carlson et al.
patent: 5390121 (1995-02-01), Wolfe
patent: 5396973 (1995-03-01), Schwemmer et al.
patent: 5398917 (1995-03-01), Carlson et al.
patent: 5492312 (1996-02-01), Carlson
patent: 5525249 (1996-06-01), Kordonsky et al.
Chang et al, "Effect of Particle Size Distributions on the Rheology of Concentrated Bimodal Suspensions," Journal of Rheology, 38(1), Jan./Feb. 1994, pp. 85-98.
Lemaire et al, "Influence of the Particle Size on the Rheology of Magnetorheological Fluids," Journal of Rheology, 39(5), Sep./Oct. 1995, pp. 1011-1020.
Poslinski et al, "Rheological Behavior of Filled Polymeric Systems II. The Effect of a Bimodal Size Distribution of Particulates," Journal of Rheology, 32(8), 1988, pp. 751-771.
Bonner Melissa
General Motors Corporation
Grove George A.
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