Effects of Particulates Alignment on Properties of Epoxy-bonded Terfenol-D Composites

Previous studies on polymer-bonded Terfenol-D composites indicated that applying a static magnetic field along the longitudinal direction of the composites during its curing period could align the particulates into chain-like structures, thereby creating the pseudo-1-3 structure,which has been proved effective to improve its magnetostriction.The aim of this paper is to evaluate the effects of particles alignment on the other properties of the composites.Therefore,both 0-3 type(without particles alignment) and pseudo-1-3 type(with particles alignment) epoxy-bonded Terfenol-D composites with 50% particles volume fraction were fabricated in this paper.Besides static magnetostriction,other properties including dynamic magnetostriction,dynamic relative permeability,dependence of electrical impedance on frequency,two Young's moduli(E~H_(33) and E~B_(33)),and magnetomechanical coupling coefficient are studied.Experimental results indicate that,compared to 0-3 type,pseudo-1-3 type magnetostrictive composite exhibits more excellent static and dynamic magnetostricton,slightly larger Young's moduli.and smaller magnetomechanical coupling coefficient.