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Reversible Magnetic Field Induced Strain in Ni2MnGa-Polymer-Composites

Kauffmann-Weiss, Sandra and Scheerbaum, Nils and Liu, Jian and Klauss, Hansjörg and Schultz, Ludwig and Mäder, Edith and Häßler, Rüdiger and Heinrich, Gert and Gutfleisch, Oliver (2012):
Reversible Magnetic Field Induced Strain in Ni2MnGa-Polymer-Composites.
14, In: Advanced Engineering Materials, (1-2), Wiley-VCH Verlag GmbH & Co. KGaA, pp. 20-27, ISSN 14381656, [Online-Edition: http://dx.doi.org/10.1002/adem.201100128],
[Article]

Abstract

Composite materials consisting of magnetic shape memory alloy particles and a polymer matrix combine the advantages of both material classes: the high achievable magnetic field induced strain (MFIS) of 6% of Ni-Mn-Ga with a ductile matrix. Engineering the particle-matrix interface as well as matching stiffness of polymer matrix is of importance for achieving high reversible MFIS to use this material as actuator or damper. We investigated those properties for Ni50.9Mn27.1Ga22.0 and Ni50.3Mn24.6Ga25.1 polymer composites. Particles were produced by gently crushing melt-extracted and subsequently annealed fibres. At room temperature, the Ni50.9Mn27.1Ga22.0 particles exhibit a 5M martensitic structure, while the Ni50.3Mn24.6Ga25.1 particles are austenitic. These particles were embedded into the polymer, either a stiff epoxy resin or a soft polyurethane. In response to an external applied magnetic field, the particles tend to relocate within the polyurethane due to its very low Young's modulus and magnetostatic interaction between particles. Slightly stiffer polymer matrices are advantageous for achieving controllable MFIS. In Ni50.9Mn27.1Ga22.0 epoxy composites, a MFIS of 0.1% was observed and was resettable by rotating the magnetic field by 90°. Furthermore, single fibre pull-out tests indicated significant improvements of the interfacial properties when using silane coupling agent treated fibres.

Item Type: Article
Erschienen: 2012
Creators: Kauffmann-Weiss, Sandra and Scheerbaum, Nils and Liu, Jian and Klauss, Hansjörg and Schultz, Ludwig and Mäder, Edith and Häßler, Rüdiger and Heinrich, Gert and Gutfleisch, Oliver
Title: Reversible Magnetic Field Induced Strain in Ni2MnGa-Polymer-Composites
Language: English
Abstract:

Composite materials consisting of magnetic shape memory alloy particles and a polymer matrix combine the advantages of both material classes: the high achievable magnetic field induced strain (MFIS) of 6% of Ni-Mn-Ga with a ductile matrix. Engineering the particle-matrix interface as well as matching stiffness of polymer matrix is of importance for achieving high reversible MFIS to use this material as actuator or damper. We investigated those properties for Ni50.9Mn27.1Ga22.0 and Ni50.3Mn24.6Ga25.1 polymer composites. Particles were produced by gently crushing melt-extracted and subsequently annealed fibres. At room temperature, the Ni50.9Mn27.1Ga22.0 particles exhibit a 5M martensitic structure, while the Ni50.3Mn24.6Ga25.1 particles are austenitic. These particles were embedded into the polymer, either a stiff epoxy resin or a soft polyurethane. In response to an external applied magnetic field, the particles tend to relocate within the polyurethane due to its very low Young's modulus and magnetostatic interaction between particles. Slightly stiffer polymer matrices are advantageous for achieving controllable MFIS. In Ni50.9Mn27.1Ga22.0 epoxy composites, a MFIS of 0.1% was observed and was resettable by rotating the magnetic field by 90°. Furthermore, single fibre pull-out tests indicated significant improvements of the interfacial properties when using silane coupling agent treated fibres.

Journal or Publication Title: Advanced Engineering Materials
Volume: 14
Number: 1-2
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Functional Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 19 May 2014 12:25
Official URL: http://dx.doi.org/10.1002/adem.201100128
Identification Number: doi:10.1002/adem.201100128
Funders: This work is supported by DFG SPP 1239.
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