Patent ID: 8404139

Claim:
A method for the preparation of a conductive magnetorheological material comprising a magnetic material A and an electrically conductive fluid B, comprising: introducing magnetic particles, which become a magnetic material A, into an electrically conductive fluid B, and applying a current in the range of 0.1 to 3 A/cm 2 ; wherein the method is implemented electrochemically in an electrochemical cell, wherein: the electrochemical cell is connected to a potential source; the electrolyte consists of an ionically conductive medium containing the particles, the mean diameter of which is between 0.1 and 10 μm; the particles are nonionic in electrically conductive fluid B; the cathode consists of a film of the conductive fluid B connected to a potential source capable of delivering a current density between 0.1 and 3 A/cm 2 , a first electrode providing contact with the cathode, a second electrode operating as the anode, and a third electrode as a reference electrode; the anode consists of a material that is nonoxidizable under the conditions of the method; and the cathode is subjected to a negative potential difference relative to the anode.