Mechanical and magnetic properties of a novel polymer infiltrated directionally solidified RE-Fe giant magnetostrictive materials
Mechanical and magnetic properties of a novel polymer infiltrated directionally solidified RE-Fe giant magnetostrictive materials
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DOI：
10.1109/tmag.2004.832148
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发表时间：
2004-08
影响因子：
2.1
通讯作者：
O. Kwon;Yong Dong Kwon;Do-hyung Kim;Jong Chul Kim;Z. Lee
中科院分区：
文献类型：
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作者：
O. Kwon;Yong Dong Kwon;Do-hyung Kim;Jong Chul Kim;Z. Lee
新开发的聚合物渗透晶粒取向复合材料Terfenol-D具有保持定向生长RFe/sub 2/相的有利晶体取向的优点。为了有效地渗透聚合物，需要制备在Tb/sub 0.33/Dy/sub 0.67/Fe/sub y/中具有低Fe含量（0.64/spl les/y/spl les/1.7）的组合物。随着Fe含量的降低，共晶相的数量增加，可以通过退火去除。该复合材料与传统的复合材料或整体Terfenol-D材料相比，显示出许多改进的性能。通过这种新材料，可以在相对较低的磁场下获得高的磁致伸缩应变。此外，在四点弯曲测试中，其显示出约65/spl sim/92 MPa的相当高的断裂模量。
Newly developed polymer infiltrated grain aligned composite Terfenol-D has the advantages of maintaining the favorable crystal orientation of the directionally grown RFe/sub 2/ phase. In order to infiltrate the polymer effectively, it is necessary to prepare composition with a low Fe content (0.64/spl les/y/spl les/1.7) in Tb/sub 0.33/Dy/sub 0.67/Fe/sub y/. With decreasing Fe content, the amount of the eutectic phase increases which can be removed by annealing. This composite shows many improved properties compared with conventional composite or monolithic Terfenol-D material. Through this new material, high magnetostrictive strain can be obtained under relatively low magnetic field. In addition, it shows a considerably higher modulus of rupture of around 65/spl sim/92 MPa in four-point bend test.