Influence of the size of magnetic filler particles on the properties of hybrid magnetic elastomer with magnetically hard filler

Степанов, Г. В.; Borin, Dmitry; Bakhtiiarov, A. V.; Стороженко, П. А.

doi:10.1016/j.jmmm.2019.166071

Cited by 12 publications

(6 citation statements)

References 14 publications

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“…In the literature, MR elastomers containing hard magnetic particles are also referred to as hard-magnetic materials (HMMs) or hard-magnetic soft materials (HMSMs). There are a number of studies addressing properties of HMS elastomers [89,[94][95][96][97][98][99][100][101][102][103][104] and soft magnetic MREs. [85,[105][106][107][108][109][110][111] Soft magnetic particles are mainly used to improve the MR effect through variation in the storage and loss moduli of MRE while hard magnetic particles are generally used in MREs for actuation purposes.…”

Section: Magnetic Particlesmentioning

confidence: 99%

“…The coercivity and remnant magnetization of FeNdB particles increase with increasing particle size. [99] An alternative possibility for fabrication of MREs is to use a mixture of both soft and hard magnetic particles within the same elastomeric matrix. It was shown that the MR effect may be optimized by choosing an appropriate mixing ratio between particles.…”

Section: Magnetic Particlesmentioning

confidence: 99%

“…The coercivity and remnant magnetization of FeNdB particles increase with increasing particle size. [ 99 ]…”

Section: Fabrication and Characterizationmentioning

confidence: 99%

See 2 more Smart Citations

The Modeling of Magnetorheological Elastomers: A State‐of‐the‐Art Review

Saber

2023

Adv Eng Mater

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The magnetorheological elastomers (MREs) are novel multifunctional materials wherein their viscoelastic properties can be varied instantly under an application of applied magnetic field. Due to their field‐dependent stiffness and damping properties, MREs are widely used in the development and design of MRE‐based adaptive vibration isolators and absorbers and also biomedical engineering. Moreover, MREs due to their inherent magnetostriction effect have enormous potential for the development of soft actuators. The dynamic behavior of MREs is affected by various material parameters (e.g., matrix and particle types, particle concentration, additives) as well as mechanical and magnetic loading parameters (e.g., frequency, amplitude, temperature, magnetic flux density). Understanding and predicting the effect of materials and loading parameters on the response behavior of MREs are of paramount importance for the design of MRE‐based adaptive structures and systems. This review paper mainly aims to provide a comprehensive study of material constitutive models to predict the nonlinear magnetomechanical behavior of MREs. Particular emphasis is paid to physics‐based models including continuum‐ and microstructure‐based models. Moreover, phenomenological models describing the dynamic magnetoviscoelastic behavior of MREs as well as the effect of temperature on the magnetomechanical behavior of such materials are properly addressed.

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Section: Magnetic Particlesmentioning

confidence: 99%

Section: Magnetic Particlesmentioning

confidence: 99%

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The Modeling of Magnetorheological Elastomers: A State‐of‐the‐Art Review

Saber

2023

Adv Eng Mater

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“…After all, the magnetic properties of composites depend on amount of the included magnetic powders [7,21].…”

Section: Magnetic Propertiesmentioning

confidence: 99%

“…Meantime, the thermally triggered retro-DA reaction of DA bonds based crosslinkages would lead to decrosslinking of the rubber networks at about 120 ºC, forming low molecular weight species with low viscosity, while the forward DA reaction at ~80 ºC would enable re-crosslinking. In addition, the isotropic NdFeB particles will act as the magnetic fillers, which are widely used in bonded magnets owing to their exceedingly good magnetic properties [5,21]. Their dispersion is going to be promoted by the fluorinated polybutadiene as described below.…”

Section: Introductionmentioning

confidence: 99%

Injection moldable, self-healable, and recyclable rubber-bonded NdFeB magnets with the magnetic particulates content up to 90 wt%

Cao

Zhu

Rong

et al. 2023

Adv Compos Hybrid Mater

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To apply the facile injection molding technique commonly used in thermoplastics processing to rubber-bonded magnets, typical highly filled thermosetting composites, an approach based on Diels-Alder (DA) chemistry is proposed by the authors. In the proof-of-concept experiments, the oligomers of hydroxyl-terminated polybutadiene rubber are successively functionalized by furyl and trifluoromethyl, and the magnetic NdFeB particles are modified by maleimide. By taking advantage of reversible DA reaction, crosslinkages are established among the treated polybutadiene oligomers and NdFeB particles. The composite exhibits very low viscosity due to de-crosslinking when heated to retro-DA reaction temperature, which provides the highly filled system with necessary thermal processibility. In addition, the fluorine groups of the rubber phase are aggregated surrounding the particulate fillers allowing for well separation of the latter in the melt state. During the subsequent cooling, the DA bonds are re-built up in the rubber and at the particles/rubber interface, respectively, offering the robustness of traditional thermosets. As a result, the polybutadiene-bonded magnets with NdFeB content up to 90 wt% can be injection molded and possess rather high magnetic properties, mechanical properties, self-healability and recyclability. The present work combines the merits of thermoplastics and thermosets, and satisfies the contradictory requirements of high filling, efficient manufacturing and balanced performance of functional polymer composites.

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Magnetic Response of Magnetoactive Elastomers with Allowance for Slippage at the Particle‐Matrix Interfaces

Vaganov

Borin

Odenbach

et al. 2021

Advcd Theory and Sims

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A new model to describe magnetization of a magnetoactive elastomer (MAE) filled with magnetically hard powder is proposed. The magnetization process is treated as a result of a joint contribution of an assembly of single‐domain particles each of which dwells inside its own elastomer cavity. Magnetization of such a particle is a complex magnetomechanical process that combines intrinsic magnetization reversal and particle mechanical rotation. Possible slippage of the particles, in the course of which they disconnect from the matrix and, on their move, rub against the cavity wall, is explicitly taken into account. The influence of the slippage effect on the macroscopic magnetization of the composite is analyzed by means of computer simulation. Occurrence of asymmetrical magnetization loops of single‐domain particles located in an elastic medium is demonstrated. It is shown that by allowing for the slippage, it becomes possible to explain the experimentally observed anomalously low but non‐zero half‐width (coercivity) of the hysteresis loops of the MAE samples.

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Influence of the size of magnetic filler particles on the properties of hybrid magnetic elastomer with magnetically hard filler

Cited by 12 publications

References 14 publications

The Modeling of Magnetorheological Elastomers: A State‐of‐the‐Art Review

The Modeling of Magnetorheological Elastomers: A State‐of‐the‐Art Review

Injection moldable, self-healable, and recyclable rubber-bonded NdFeB magnets with the magnetic particulates content up to 90 wt%

Magnetic Response of Magnetoactive Elastomers with Allowance for Slippage at the Particle‐Matrix Interfaces

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