Magnetostriction and piezoresistivity in elastomers filled with magnetic particles

摘要: Magnetorheological elastomers consist in a dispersion of micron size (typically 1-5μm) magnetic particles inside an elastomer. During curing, the suspension is subjected to strong field that creates attractive force between direction parallel field, thus arranging homogeneous chain-like structure. Once polymer cured, this unidirectional structure kept. We shall present some results showing adaptive character material does not depend on fact are grafted matrix or not, but rather volume fraction and above all their organisation matrix. In particular we see that, addition change modulus presence very important magnetostrictive effect can also be observed such composite. explain behaviour by existence small layer elastomer particles. other situation, with use nickel elastomer, gap much thinner compression resistivity sample many orders magnitude making it sensitive pressure sensor.