Fabrication and magnetorheological property of nano-sized magnetic particles

Magnetorheological (MR) fluid, a suspension of synthesized nano-sized magnetic particle in non magnetic carrier fluid, was prepared and then their various characteristics were examined in this study. Magnetic particle was at first synthesized in a rather simple process of decomposition of penta carbonyl iron (Fe(CO)5) using oleyl amine and kerosene. Magnetic property and morphology of the synthesized nanoparticle were confirmed via vibration sample magnetometer (VSM) and transmission electron microscopy (TEM), respectively. MR fluid of nano-sized magnetic particle dispersed in a carrier fluid, was investigated under different external magnetic field strengths via a rotational rheometer. Their flow behaviors at a steady shear mode were examined under magnetic field strength.