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Proceedings Paper

Magnetomechanical properties of magnetostrictive composites with high volume of fraction Terfenol-D powder
Author(s): Jerzy Kaleta; Daniel Lewandowski; Rafal Mech
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Paper Abstract

The role of Smart Magnetic Materials (SMM) is still increasing. One type of SMM are Giant Magnetostrictive Materials (GMM) which can be represented by i.e. Terfenol-D. The biggest difficulty with mechanical application of GMM is its brittleness. On the other hand, increase of frequency generate meaningfully eddy currents. These disadvantages tend to search new solutions in a form of composite materials with giant magnetostriction (GMMC). The matrix for GMMC most often is an epoxy resin with magnetostrictive material inside (in a form of powder, flakes or tiny rods made of i.e. Terfenol-D). Several composites, with outstanding magnetostrictive properties, have been synthesized combining an epoxy resin with polycrystalline powders of Terfenol-D. Application of appropriate way of compression allowed to achieve composites consisting near 70% volume fraction of Terfenol-D powder in comparison with about 48% volume fraction of reinforcement in traditional production way. Composites had random and preferential grain orientation which was obtained by curing the material respectively with or without a magnetic field. The quasistatic magnetomechanical properties of the composites were investigated and compared with monolithic Terfenol-D alloy. The highest response was obtained for a perpendicular polarized composite. Investigated composite are promising magnetostrictive material enable to create a new type of actuators and magnetic field sensor.

Paper Details

Date Published: 30 March 2010
PDF: 10 pages
Proc. SPIE 7644, Behavior and Mechanics of Multifunctional Materials and Composites 2010, 76441L (30 March 2010); doi: 10.1117/12.847845
Show Author Affiliations
Jerzy Kaleta, Wroclaw Univ. of Technology (Poland)
Daniel Lewandowski, Wroclaw Univ. of Technology (Poland)
Rafal Mech, Wroclaw Univ. of Technology (Poland)


Published in SPIE Proceedings Vol. 7644:
Behavior and Mechanics of Multifunctional Materials and Composites 2010
Zoubeida Ounaies; Jiangyu Li, Editor(s)

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