Synthesis and characterization of iron-based alloy nanoparticles for magnetorheological fluids

Magnetorheology of colloidal dispersion containing Fe nanoparticles synthesized by the arc-plasma method

“…The saturation magnetization of the Fe nanoparticles was $190 emu/g by linear extrapolation about 10 kOe past to H=0, which is about 87% of bulk a Fe at room temperature (218 emu/g) [22]. This value is higher than those of Fe nanoparticles synthesized using a microwave plasma technique [13] and Fe-based alloy nanoparticles recently prepared for MR fluids [9]. plastic behavior is generally observed for micron-sized MR fluids [23].…”

“…Nanoparticles are capable of forming a uniform dispersion in a carrier medium, and of improving the tendencies of sedimentation [2,3]. Fe nanoparticle is one of the best candidates for MR fluids due to its high saturation magnetization [1,10], among other magnetic nanoparticles such as ferrites [3,[6][7][8] and alloys [9]. Fe nanoparticles for MR fluids have been synthesized using a microwave plasma technique, with an average diameter of 20 nm [10] and 28 nm [11,12].…”

Synthesis of nanocrystalline Co–Ni alloys by precursor approach and studies on their magnetic properties

“…In the recent years, magnetic nanoparticles such as metals, alloys and multi-layers have attracted tremendous interest from researchers in many fields due to their promising applications in the area of ferro-fluids [1], microwave absorbance [2], hyperthermia [3], catalysis [4], magnetic resonance imaging (MRI) and drug delivery system [5], magnetic recording and magnetic based sensors [6,7] and excellent reviews are available on such topics [8,9]. Nanocrystalline magnetic alloys such as Ni-Cu, Co-Ni, Fe-Co and Fe-Co-Cu are promising candidates for hyperthermia and microwave applications because their magnetic transition temperatures and microwave absorbance characteristics vary with composition and grain size.…”

Magnetorheological Elastomer‐Based Materials and Devices: State of the Art and Future Perspectives

“…The authors highlighted that the sample with five coating cycles and a PDMS to curing agent ratio of 1:20 was the one that achieved the best compromise between conductivity, MR effect, and mechanical performance. Many other works have also successfully combined PDMS with different magnetic fillers to produce MREs, such as nickel nanoparticles of different morphologies, [ 94 ] CoFe 2 O 4 nanowires, nanorods, and nanotubes, [ 95 ] or CIPs. [ 96,97 ]…”