Titre du document / Document title

Effect of combined magnetic bias and drive fields on dynamic magnetomechanical properties of Terfenol-D/epoxy 1-3 composites

Auteur(s) / Author(s)

SIU WING OR ⁽¹⁾ ; NERSESSIAN Nersesse ⁽¹⁾ ; CARMAN Gregory P. ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Mechanical and Aerospace Engineering Department, University of California, Los Angeles, Engineering IV, P.O. Box 951597, 420 Weatwood Plaza, CA 90095-1597, ETATS-UNIS

Résumé / Abstract

The dynamic magnetomechanical properties of Terfenol-D/ epoxy 1-3 magnetostrictive composites with approximately 50% Terfenol-D volume fraction have been investigated under different combined magnetic bias (H_Bias = 5-140kA/m) and drive (H₃= 1-9kA/ m) fields. These properties include elastic moduli (E^H₃ and E^B₃), dynamic relative permeability (μ^T_r33), dynamic strain coefficient (d₃₃), magnetomechanical coupling coefficient (k₃₃), and the ratio of the dynamic strain coefficient to the dynamic susceptibility (d₃₃/χ₃₃). The changes in the composite properties with applied fields can be explained in terms of domain wall motion followed by saturation. At a low H₃ of 1 kA/m, the available non-180° domain state created by residual compressive stresses in the composites results in negative-ΔE, d₃₃, k₃₃, and d₃₃/χ₃₃ maximizing near H_Bias=40 kA/m. As H₃ is increased, domain wall motion occurs, decreasing the H_Bias required to maximize the properties by reducing stress-induced anisotropy.

Revue / Journal Title

Journal of magnetism and magnetic materials   ISSN 0304-8853   CODEN JMMMDC 

Source / Source

2003, vol. 262, n^o2, pp. L181-L185 (12 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Amsterdam, PAYS-BAS  (1975) (Revue)

Mots-clés anglais / English Keywords

Rare earth alloys ; Transition element alloys ; Ternary alloys ; Iron alloys ; Dysprosium alloys ; Terbium alloys ; Epoxides ; Magnetic particles ; Composite materials ; Domain wall motion ; Magnetomechanical effects ; Dynamic loads ; Permeability ; Elastic modulus ; Residual stresses ; Magnetostriction ; Experimental study ; Compressive stress ; Bias voltage ;

Mots-clés français / French Keywords

Lanthanide alliage ; Métal transition alliage ; Terfenol-D ; Dy Fe Tb ; Alliage TbDyFe ; Alliage ternaire ; Fer alliage ; Dysprosium alliage ; Terbium alliage ; Epoxyde ; Particule magnétique ; Matériau composite ; Mouvement paroi domaine ; Effet magnétomécanique ; Charge dynamique ; Perméabilité ; Module élasticité ; Contrainte résiduelle ; Magnétostriction ; Etude expérimentale ; Contrainte compression ; Tension polarisation ;

Mots-clés espagnols / Spanish Keywords

Movimiento pared dominio ; Tensión compresión ; Voltage polarización ;

Mots-clés d'auteur / Author Keywords

75.80. + q dynamic magnetomechanical properties ; Terfenol-D ; Magnetostrictive particulate composites ; Domain wall motion ; Transducers and actuators ;

Localisation / Location

INIST-CNRS, Cote INIST : 17230, 35400011112167.0020