High-temperature magnetic shape memory actuation in a Ni-Mn-Ga single crystal

被引：37
|
作者：
Pagounis, E. [1 ]
Chulist, R. [2 ]
Szczerba, M. J. [2 ]
Laufenberg, M. [1 ]
机构：
[1] ETO MAGNET GmbH, D-78333 Stockach, Germany
[2] Polish Acad Sci, Inst Met & Mat Sci, PL-3005 Krakow, Poland
来源：
SCRIPTA MATERIALIA | 2014年 / 83卷
关键词：
Ferromagnetic shape memory; Magnetic properties; Crystal structure; Twinning; Actuators; FIELD-INDUCED STRAIN; TWIN BOUNDARIES; DEFORMATION; GROWTH;
D O I：
10.1016/j.scriptamat.2014.04.001
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report a Ni-Mn-Ga single crystal that demonstrates giant magnetic field-induced strain of 7.3% at room temperature and of 4.5% at 80 degrees C. This is the highest temperature at which strain caused by twin boundary motion induced by an external magnetic field has been reported. A dedicated testing bench was constructed for the high-temperature experiments. X-ray diffraction reveals that at room temperature the material possesses a mixture of 5M and of 7M martensites, while at 80 degrees C the 5M structure predominates. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：29 / 32
页数：4
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