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NiMn-Based Alloys and Composites for Magnetically Controlled Dampers and Actuators

Liu, Jian and Scheerbaum, Nils and Kauffmann-Weiss, Sandra and Gutfleisch, Oliver (2012):
NiMn-Based Alloys and Composites for Magnetically Controlled Dampers and Actuators.
In: Advanced Engineering Materials, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, pp. 653-667, 14, (8), ISSN 14381656, [Online-Edition: http://dx.doi.org/10.1002/adem.201200038],
[Article]

Abstract

As a new class of magnetically driven active materials, magnetic shape memory (MSM) alloys show large strains of up to 10% in Ni 2MnGa single crystal with a modulated martensitic structure. The magnetic field induced twin boundary motion can be exploited for actuators, sensors, and as it is an energy dissipating process, also for vibration damping devices. However, single crystals of Ni 2MnGa are difficult to prepare and are inherently very brittle. One solution is the use of aligned MSM particles suspended in a stiffness-matched polymer matrix. In this review, we focus on the preparation and characterization of textured NiMn-based MSM composite. Essential issues, e.g., the criterion of polymer selection and the interface of MSM particles and polymer are discussed. Second aspect of the paper is to review recent developments in metamagnetic shape memory Ni Mn-(In,Sn,Sb) systems which exhibit field-driven multifunctional properties such as magnetocaloric effect, magnetoresistant change, magnetoelectricity, and thermoelectricity.

Item Type: Article
Erschienen: 2012
Creators: Liu, Jian and Scheerbaum, Nils and Kauffmann-Weiss, Sandra and Gutfleisch, Oliver
Title: NiMn-Based Alloys and Composites for Magnetically Controlled Dampers and Actuators
Language: English
Abstract:

As a new class of magnetically driven active materials, magnetic shape memory (MSM) alloys show large strains of up to 10% in Ni 2MnGa single crystal with a modulated martensitic structure. The magnetic field induced twin boundary motion can be exploited for actuators, sensors, and as it is an energy dissipating process, also for vibration damping devices. However, single crystals of Ni 2MnGa are difficult to prepare and are inherently very brittle. One solution is the use of aligned MSM particles suspended in a stiffness-matched polymer matrix. In this review, we focus on the preparation and characterization of textured NiMn-based MSM composite. Essential issues, e.g., the criterion of polymer selection and the interface of MSM particles and polymer are discussed. Second aspect of the paper is to review recent developments in metamagnetic shape memory Ni Mn-(In,Sn,Sb) systems which exhibit field-driven multifunctional properties such as magnetocaloric effect, magnetoresistant change, magnetoelectricity, and thermoelectricity.

Journal or Publication Title: Advanced Engineering Materials
Volume: 14
Number: 8
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
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: 22 Apr 2013 08:26
Official URL: http://dx.doi.org/10.1002/adem.201200038
Identification Number: doi:10.1002/adem.201200038
Funders: The research leading to these results has received funding from DFG SPP 1239.
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