Fe–Ga alloy based magnetorheological fluid and its viscoelastic characteristics

Abstract

Flake-like Galfenol particles were fabricated by a conventional rolling and texture annealing process and adopted as the magnetorheological (MR) particle. The flake morphology and crystalline structure were scrutinized using scanning electron microscope and X-ray diffraction, respectively. The Galfenol particles had a high saturation magnetization value of 174emu/g and a Galfenol particle-based MR suspension exhibited typical MR characteristics under input magnetic field strengths. While its shear stress curves are fitted well using the Bingham model, its storage moduli showed a stable plateau area for whole angular frequencies, suggesting distinguished solid-like behavior of the MR fluid.