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Magnetorheological elastomer : ウィキペディア英語版 | Magnetorheological elastomer
Magnetorheological elastomers (MREs) (also called magnetosensitive elastomers) are a class of solids that consist of polymeric matrix with embedded micro- or nano-sized ferromagnetic particles such as carbonyl iron. As a result of this composite microstructure, the mechanical properties of these materials can be controlled by the application of magnetic field. ==Fabrication== MREs are typically prepared by curing process for polymers. The polymeric material (e.g. silicone rubber) in its liquid state is mixed with iron powder and several other additives to enhance their mechanical properties.〔Jolly, M. R., Carlson, J. D. & Muñoz, B. C. A model of the behaviour of magnetorheological materials. Smart Mater. Struct. 5, 607–614 (1996).〕 The entire mixture is then cured at high temperature. Curing in the presence of a magnetic field causes the iron particles to arrange in chain like structures resulting in an anisotropic material. If magnetic field is not applied, then iron-particles are randomly distributed in the solid resulting in an isotropic material.
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