Application of Fe78Si9B13 amorphous particles in magnetorheological fluids

Abstract

Fe₇₈Si₉B₁₃ amorphous particles are applied in the preparation of silicon oil-based magnetorheological (MR) fluids. The structure and morphology of the Fe₇₈Si₉B₁₃ amorphous particles were characterized by X-ray diffraction and scanning electron microscopy, respectively. The magnetic properties of the Fe₇₈Si₉B₁₃ amorphous particles and the MR fluids prepared with Fe₇₈Si₉B₁₃ amorphous particles were characterized by vibrating sample magnetometry. The MR effect of the MR fluids was investigated with a rotational rheometer. The results of VSM show that the saturation magnetization of Fe₇₈Si₉B₁₃ amorphous particles is 169.48 emu g⁻¹, accompanying low remanence and low coercivity. The results of rotational rheometry manifest that the MR fluids with Fe₇₈Si₉B₁₃ amorphous particles have an improved magnetorheological response compared with magnetic fluids with Fe₃O₄ nanoparticles under an applied magnetic field.