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Magnetite/copolymer Nanosphere Added Soft-magnetic Carbonyl Iron Based Magnetorheological Fluid And Its Damping Performance

Han, Wen Jiao ; Wang, Guo Ping ; Yang, Fu Feng

IEEE transactions on magnetics, 2023-11, Vol.59 (11), p.1-1

New York: IEEE

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Título:
Magnetite/copolymer Nanosphere Added Soft-magnetic Carbonyl Iron Based Magnetorheological Fluid And Its Damping Performance
Autor: Han, Wen Jiao ; Wang, Guo Ping ; Yang, Fu Feng
Assuntos: carbonyl iron (CI) ; Carbonyls ; Chemical synthesis ; Copolymers ; Damping ; Iron ; Iron oxides ; Magnetic fields ; Magnetic properties ; Magnetic resonance imaging ; Magnetism ; Magnetite ; magnetite/copolymer nanosphere ; Magnetomechanical effects ; magnetorheological damper (MRD) ; magnetorheological fluid (MRF) ; Magnetorheological fluids ; Mechanical systems ; Nanospheres ; Saturation magnetization ; Stress ; Vibration control
É parte de: IEEE transactions on magnetics, 2023-11, Vol.59 (11), p.1-1
Descrição: Magnetite/copolymer (Fe 3 O 4 /copolymer) nanosphere was synthesized via chemical oxidative polymerization and utilized as an additional ingredient in soft-magnetic carbonyl iron (CI) microsphere based magnetorheological fluid (MRF) to improve its magnetorheological and damping performance. MRFs with a monodisperse phase (CI-based MRF) and with a bidisperse phase (CI/nanosphere-based MRF) were prepared using polyalphaolefin as an oil medium. Magnetorheological performances of CI-based MRF and CI/nanosphere-based MRF were analyzed by the steady shear model under gradient magnetic field. Results shown that the flow curves are well fitted to the Hershel-Bulkley model, and dynamic yield stresses strongly depend on intensity of the magnetic field. CI/nanosphere-based MRF exhibited improved magnetorheological, which is attributed to the nanosphere filling the free volume among the CI, inducing stiffer chain structures. Owing to its improved magnetorheological properties, the CI/nanosphere-based MRF were further injected into a custom designed magnetorheological damper (MRD), and its damping force characteristics including damping force as a function of magnetic field, displacement and velocity, were investigated for vibration reduction applications in mechanical system.
Editor: New York: IEEE
Idioma: Inglês

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Magnetite/copolymer Nanosphere Added Soft-magnetic Carbonyl Iron Based Magnetorheological Fluid And Its Damping Performance

Han, Wen Jiao ; Wang, Guo Ping ; Yang, Fu Feng

New York: IEEE

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