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2 edition of Novel processing techniques applied to Terfenol-D based magnetostrictive materials found in the catalog.

Novel processing techniques applied to Terfenol-D based magnetostrictive materials

Alexander Ivor Bevan

Novel processing techniques applied to Terfenol-D based magnetostrictive materials

by Alexander Ivor Bevan

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Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Statementby Alexander Ivor Bevan.
The Physical Object
Pagination73, [27]p. :
Number of Pages73
ID Numbers
Open LibraryOL19087495M

  Terfenol-D is an alloy comprised of Terbium, Dysprosium and Iron. Terfenol-D is a solid-state material capable of converting energy from one form to another. In the case of electrical-to-mechanical conversion, the magnetostriction of the Terfenol-D generates strains times greater than traditional magnetostrictives, and times greater. Meng-Chien Lu, Lei Mei, Dae-Yong Jeong, Jing Xiang, Huaqing Xie, Q. M. Zhang, Enhancing the magnetoelectric response of Terfenol-D/polyvinylidene fluoride/Terfenol-D laminates by exploiting the shear mode effect, Applied Physics Letters, /, , 11, (), ().

A mechanism for magnetostriction in the highly magnetostrictive material Terfenol‐D is explained in detail. This mechanism is based on a theory of magnetostriction [R. D. James and D. Kinderlehrer, Philos. Mag. B 68, ()] that is particularly suited to predictions of the macroscopic behavior of materials that exhibit large magnetostriction. Some experiments that test these predictions. Large magnetostrictions of ×10 −6 at KA/m for the Terfenol-D composite with an applied compressive stress of 10 MPa and ×10 −6 at KA/m for the Pr Tb Dy Fe 2 composite have been obtained with the following conditions: particle size of μm, weight ratio of binder to powder of , and a compaction pressure.

composites containing the Terfenol-D particles (Kaleta, , Lo, , Schwartz, ). This involves necessity to examine properties of these new types of composite materials. In this paper we present the investigation on magnetostriction and DC magnetic properties, for Terfenol-D based composites. The main goal of performed investigations was to. The inverse magnetostrictive effect is an effective property for energy harvesting; the materials need to have large magnetostriction and ease of mass production [].Terfenol-D has been an important magnetostrictive material and is widely known due to its giant magnetostriction and low magnetic anisotropy [].Davino et al. [] investigated the magnetostrictive and magnetic properties of Terfenol.


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Novel processing techniques applied to Terfenol-D based magnetostrictive materials by Alexander Ivor Bevan Download PDF EPUB FB2

High force magnetostrictive materials such as Terfenol-D provide broadband capability (DC up to 20 kHz) with forces up to N [5, 6], which are utilized in many industrial settings such as high Author: Marcelo Dapino.

1. Introduction. Magnetrostictive materials have been widely used for the construction of magnetic sensors and actuators.Among other materials, Terfenol-D (Tb Dy Fe) can be considered as the most studied one due to the possibility to achieve high magnetostriction strains.It is widely known that the magneto-elastic properties of this material can be modified as a function of Cited by:   In this paper a Terfenol-D rod (a giant magnetostrictive material-GMM) is used for tests.

For simultaneous measurement of temperature and strain two multiplexed FBGs are used. The first test presents unipolar characteristics of Terfenol-D magnetostriction.

Other test determines the Terfenol-D response for different by: 1. Ever since the invention of Terfenol-D, great advances in directional solidification techniques have been made to the point that the volume production of large diameter rods up to 68 mm with uniform magnetostrictive properties is now possible.

Even with the advances, however, the production of grain-aligned Terfenol-D rods is considered to be Cited by: In this system, the extrinsic Fabry-Perot based interferometric configuration was used and a Terfenol-D (Tb Dy Fe ) rod was selected as the magnetostrictive material because of its.

A model for the force measured with a Terfenol-D transducer used to sense both force and acceleration is developed based on coupled linear magnetomechanical constitutive equations.

ELSEVIER Journal of Alloys and Compounds () Journal of ALLOYS AND N?OU~DI Optimized TERFENOL-D manufacturing processes Jonathan D. Snodgrass*, O.D. McMasters ETREMA Products, Inc., N. Loop Drive, Ames, IowaUSA Received 6 November ; received in revised form 8 January Abstract The giant magnetostrictive material TERFENOL-D.

The main advantages of magnetostrictive composites based on a nonmagnetic polymer matrix and containing Terfenol-D powder particles are: reduction of bulk Terfenol-D's drawbacks (eddy currents at higher operating frequencies and its brittleness limiting its use under, e.g., tensile stress [1], [6]), whereby its application range is.

novel material Terfenol–D in force sensor applications. By the reason that Terfenol–D has one of the largest magnetostrictive constant known we anticipated to get a higher sensitivity of the force sensor as compared to other materials e.g.

steel. A simple and robust single coil sensor set–up is introduced. The dependency on the. Terfenol-D, the material composed of terbium, dysprosium and iron, is well-known as one of the key magnetostrictive materials due to its large magnetostriction (– ppm).

It has been reported that Terfenol-D possesses a high magnetostriction coefficient of λ = × 10 −3 [ 2 ] and low magnetic anisotropy, making it useful for. The development of materials that exhibit strong magnetostrictive effects, such as Terfenol-D that is a giant magnetostrictive iron-terbium-dysprosium alloy [11], led to the popularity of.

Measurements were made of the piezomagnetic d33 coefficient, the free permeability, μ33T, and the open-circuit elastic compliance coefficient, s33H, of grain-oriented Terfenol-D, TbDyFe in Fig. 1 is needed. The set–up consists of the Terfenol–D specimen utilized as transducting element as well as elastic body, one excitation coil, one read out coil and a magnetic return path.

The force in the range of 0 • Fcompressive • 3 kN is directly applied to the Terfenol–D probe, that has a. The main advantages of magnetostrictive composites based on a nonmagnetic polymer matrix and containing Terfenol-D powder particles are as follows: reduction of solid Terfenol-D’s drawbacks (eddy currents at higher operating frequencies and its brittleness limiting its use under, for example, tensile stress [ 1, 20 ], whereby its application.

A novel configuration of composite of Terfenol-D and stack PZT actuator is proposed for coil-free magnetic force control. This magnetic force control is based on the inverse magnetostrictive effect of magnetostrictive materials whereby the stress resulting magnetic force is controlled by the voltage of the actuator.

Terfenol-D, an alloy of the formula TbxDy1−xFe2 (x ~ ), is a magnetostrictive material. It was initially developed in the s by the Naval Ordnance Laboratory in United States. The technology for manufacturing the material efficiently was developed in the s at Ames Laboratory under a.

Thanks to the development of giant magnetostrictive materials, at least three commercially available magnetostrictive materials make energy harvesting p ossible: crystalline alloys from ETREMA Products, I nc. 19 Terfenol-D (Tb Dy Fe ) and Galfenol (Fe 1-x Ga x, Giant magnetostrictive actuators are suitable for applications requiring large mechanical displacements under low magnetic fields; for instance Terfenol-D made out of rare earth-iron materials can.

The giant magnetostrictive terbium‐iron alloy material, Terfenol‐D, offers the highest strain of any magnetostrictive material at room temperature using practical drive fields. The increasing use of Terfenol‐D in a wide variety of production devices and systems has driven the development of new, advanced manufacturing techniques in material production to provide greater strain.

Magnetostrictive actuators play an important role in the perception of usefulness of smart materials and devices. Their applications are potentially wider than that of piezoelectric actuators because of the higher energy density and intrinsic robustness.

However, the non-negligible hysteresis and complexity of their characteristics make the design and control quite difficult and has limited.

A dynamic simulation model has been developed. Registered data from static measurements of the magnetostrictive strain for different magnetizations and mechanical stresses are used as numerical input. Easy examination of differences in dynamic performance between samples of different compositions and manufacturing methods is also possible due to a computer‐aided input data .DOI: / Corpus ID: Transducer-based measurements of Terfenol-D material properties @inproceedings{CalkinsTransducerbasedMO, title={Transducer-based measurements of Terfenol-D material properties}, author={Frederick T.

Calkins and Alison B. Flatau}, booktitle={Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring}, year={} }.pseudo binary alloy Terfenol-D, Tb Dy Fe –, which has become the primary magnetostrictive material for transducer applications.

Terfenol-D exhibits a com-bination of high single crystal magnetostriction, ¼ 10 6, and low magnetocrystalline anisotropy, K 1 ¼ Jm 3. Since magnetostriction is an.