Giant Magnetostrictive Nanocrystalline DyFe2 Bulk Composites

Magnetic properties of Terfenol-D film on a compliant substrate

“…The cubic Laves phase alloy Td x Dy 1 À x Fe y (0.27 rx r0.3,1.9r yr2), commercially known as Terfenol-D, has low magnetocrystalline anisotropy, giant magnetostriction at low magnetic field [1] and little decrease of the magnetostriction under cyclic stress [2]. In the last few years, the interest in magnetostrictive thin films is rapidly growing due to the possible applications in transducers, actuators, sensors, adaptive vibration control systems, micromechanical devices and multiferroic functional devices.…”

Predicting performance of polymer-bonded Terfenol-D composites under different magnetic fields

“…However, its brittleness and large eddy current losses at high frequencies prevent it from certain applications [1]. The method of combining Terfenol-D particles with polymers, which was proposed by Sandlund and Angulo in 1994, has been proved to be an effective way to overcome those shortcomings.…”

New Polyurethane‐based magnetostrictive composites: Dynamical mechanical properties

“…Therefore, it has been a commercially available magnetostrictive material for application in many fields, as in sonar and actuator devices [5]. However, Terfenol‐D alloys exhibit enormous anisotropy of magnetostriction [5, 6] which together with the frequency limitation due to eddy current losses, the brittleness of the material, and the difficulty in manufacturing have limited its useful frequency range [7, 8].…”

“…Moreover, polymer composites have historically demonstrated dramatic enhancement of neat polymer matrix properties. In some works of other authors, thermostable resins as rigid epoxy [12, 16–21], unsaturated polyester [22] and phenol‐type resins [6, 8, 23] have been used as binders for the Terfenol particles with promising results.…”

“…In most of these papers, the thermosetting resin was used as binder in the process of compaction of the Terfenol‐D to obtain the final material. Therefore, the particle alignment was done during the compaction process and as the compaction pressure increases the magnetostrictive properties deteriorate while the mechanical strength improves linearly [8]. As thermosetting resins were used in the compaction process, this is an irreversible process and therefore the Terfenol‐D particles cannot be reoriented anymore.…”