Magnetoactive elastomer based on magnetically hard filler: Synthesis and study of viscoelastic and damping properties

Степанов, Г. В.; Borin, Dmitry; Kramarenko, Elena Yu.; Богданов, В. В.; Semerenko, D. A.; Стороженко, П. А.

doi:10.1134/s0965545x14050149

Cited by 47 publications

(35 citation statements)

References 32 publications

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“…Recently, in addition to these soft magnetic particles, studies have been made on MREs using hard magnetic fillers [ 21 , 65 , 66 , 67 ]. Conventional soft magnetic particle-based MREs aimed at maximizing the MR effect.…”

Section: Mre Materialsmentioning

confidence: 99%

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

et al. 2020

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Magnetorheological (MR) elastomers become one of the most powerful smart and advanced materials that can be tuned reversibly, finely, and quickly in terms of their mechanical and viscoelastic properties by an input magnetic field. They are composite materials in which magnetizable particles are dispersed in solid base elastomers. Their distinctive behaviors are relying on the type and size of dispersed magnetic particles, the type of elastomer matrix, and the type of non-magnetic fillers such as plasticizer, carbon black, and crosslink agent. With these controllable characteristics, they can be applied to various applications such as vibration absorber, isolator, magnetoresistor, and electromagnetic wave absorption. This review provides a summary of the fabrication, properties, and applications of MR elastomers made of various elastomeric materials.

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Section: Mre Materialsmentioning

confidence: 99%

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

et al. 2020

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“…After preparation of the mixture and heating it above 100 °C, the process of polymerization begun. It is described in detail in [ 52 ]. The concentration of the filler was 30 vol.%.…”

Section: Methods Of Production Of Permalloy Fillers and Fabricatiomentioning

confidence: 99%

Magnetorheological Effect of Magnetoactive Elastomer with a Permalloy Filler

et al. 2020

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Within the frames of this study, the synthesis of a permalloy to be used as a filler for magnetoactive and magnetorheological elastomers (MAEs and MREs) was carried out. By means of the mechanochemical method, an alloy with the composition 75 wt.% of Fe and 25 wt.% of Ni was obtained. The powder of the product was utilized in the synthesis of MAEs. Study of the magnetorheological (MR) properties of the elastomer showed that in a ~400 mT magnetic field the shear modulus of the MAE increased by a factor of ~200, exhibiting an absolute value of ~8 MPa. Furthermore, we obtained experimentally a relative high loss factor for the studied composite; this relates to the size and morphology of the synthesized powder. The composite with such properties is a very perspective material for magnetocontrollable damping devices. Under the action of an external magnetic field, chain-like structures are formed inside the elastomeric matrix, which is the main determining factor for obtaining a high MR effect. The effect of chain-like structures formation is most pronounced in the region of small strains, since structures are partially destroyed at large strains. A proposed theoretical model based on chain formation sufficiently well describes the experimentally observed MR effect. The peculiarity of the model is that chains of aggregates of particles, instead of individual particles, are considered.

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“…Particles of BASF carbonyl iron powder (CIP) type CC are spherical (average size approximately 5 µm), while particles of NdFeB-alloy powder have irregular geometry with a size in a range between 40 and 100 µm (figure 1). The surface of the powders' particles is modified using the Baysilone ® oil M100 to avoid particle aggregation, making the particles' surfaces hydrophobic to provide a better compatibility with the matrix, as reported in [9].The overall weight concentration of powder in samples is approximately 82%, and the weight ratio between magnetic soft and hard fractions was 1 : 4. The mixed filler is mechanically stirred into the liquid matrix.…”

Section: Samples and Methods (A) Composition And Fabrication Of Samplesmentioning

confidence: 99%

On anisotropic mechanical properties of heterogeneous magnetic polymeric composites

Borin

Степанов

Dohmen

2019

Phil. Trans. R. Soc. A.

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This study is devoted to the magneto-mechanical characterization of heterogeneous magnetoactive elastomers based on an elastic polydimethylsiloxane matrix with embedded spherical magnetic soft microparticles and magnetic hard microparticles of irregular shape. An issue of the anisotropic mechanical properties of these smart composites is considered. Non-magnetized and pre-magnetized specimens are characterized using a planar shear and axial loading in an externally applied homogeneous magnetic field. The field direction differs relative to the direction of the field used for the specimens pre-magnetization. Results of the different methods allow comparison of the tensile shear moduli for the samples with an initially identical composition. Obtained results demonstrate a strong correlation between the composite behaviour and orientation of the magnetic field used for the pre-magnetization of the sample relative to the external field applied to a sample during the test. Composites pre-magnetized in the direction parallel to an applied mechanical force and external magnetic field show higher magnetorheological response than composites pre-magnetized transversally to the force and the field. Application of the external field directed opposite to the direction of the pre-magnetization reduces the observed stiffening. Moreover, in this situation a softening of the material can be observed, depending on the magnitude of the external field and the field used for pre-magnetization. This article is part of the theme issue ‘Heterogeneous materials: metastable and non-ergodic internal structures’.

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Magnetoactive elastomer based on magnetically hard filler: Synthesis and study of viscoelastic and damping properties

Cited by 47 publications

References 32 publications

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

Magnetorheological Effect of Magnetoactive Elastomer with a Permalloy Filler

On anisotropic mechanical properties of heterogeneous magnetic polymeric composites

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