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Modification of the adsorption properties of the dispersed phase of magnetorheological liquids

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Journal of Engineering Physics and Thermophysics Aims and scope

Abstract

A rather simple method for modifying the surface of powder carbonyl ion — the most widespread material of the active dispersed phase of magnetorheological liquids — is developed. It is shown that the specimens of liquids prepared based on modified carbonyl iron have an improved sedimentation stability, a viscosity severalfold lower than the initial one, and hence an expanded control range of rheological parameters when the magnetorheological effect is the same as in reference specimens.

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Abbreviations

C :

concentration, g/liter

λ :

wavelength, nm

A :

adsorption (adsorption capacity), g of MR/g of Fe

q :

specific surface of the particles, m2/g

S sed :

sedimentation constant, stilbs

u :

sedimentation rate of the particles, m/sec

g :

acceleration of the gravitational or centrifugal force field, m/sec2

τ :

time, min

ΔM :

relative mass decrease, %

t :

temperature, °C

α :

volume fraction of released hydrogen, %

H :

magnetic field strength, A/m

η:

dynamic viscosity, Pa·sec

γ:

rate of shear, sec−1

References

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  7. S. R. Gorodkin, V. I. Kordonskii, E. V. Medvedeva, and Z. A. Novikova, in:Collection of Scientific Papers of the Academic Scientific Complex "A. V. Luikov Heat and Mass Transfer Institute," National Academy of Sciences of Belarus "Heat and Mass Transfer 98/99" [in Russian], Minsk (1999), pp. 67–71.

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Authors and Affiliations

  1. Academic Scientific Complex "A. V. Luikov Heat and Mass Transfer Institute", National Academy of Sciences of Belarus, Minsk, Belarus

    S. R. Gorodkin & Z. A. Novikova

  2. Institute of Physicoorganic Chemistry, National Academy of Sciences of Belarus, Minsk, Belarus

    V. N. Makatun & S. V. Matveichuk

Authors
  1. S. R. Gorodkin
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  2. V. N. Makatun
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  3. S. V. Matveichuk
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  4. Z. A. Novikova
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Additional information

Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 73, No. 3, pp. 476–481, May–June, 2000.

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Gorodkin, S.R., Makatun, V.N., Matveichuk, S.V. et al. Modification of the adsorption properties of the dispersed phase of magnetorheological liquids. J Eng Phys Thermophys 73, 460–464 (2000). https://doi.org/10.1007/BF02681784

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  • DOI: https://doi.org/10.1007/BF02681784

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