Fe-Ga alloy,magnetostriction,rare earth Ce addition,microstructure," /> Fe-Ga alloy,magnetostriction,rare earth Ce addition,microstructure,"/> Fe-Ga alloy,magnetostriction,rare earth Ce addition,microstructure,"/> 稀土Ce添加对Fe<sub>83</sub>Ga<sub>17</sub>合金微结构和磁致伸缩性能的影响
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Acta Metall Sin  2013, Vol. 49 Issue (1): 87-91    DOI: 10.3724/SP.J.1037.2012.00498
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EFFECTS OF Ce ADDITION ON THE MICROSTRUCTURE AND MAGNETOSTRICTION OF Fe83Ga17 ALLOY
YAO Zhanquan1,3, ZHAO Zengqi1,2, JIANG Liping2,HAO Hongbo 2, WU Shuangxia 2,ZHANG Guangrui2, YANG Jiandong2
1. School of Materials Science and Engineering, Inner Mongolia University of Technology, Huhhot 010051
2. Baotou Research Institute of Rare Earths, Baotou 014030
3. School of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Huhhot 010018
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Abstract  

Fe-Ga alloy, which was a new type of magnetostrictive material with high magnetostriction, low hysteresis, high tensile strength and good machinability, has been widely studied. However, the magnetostrictive properties of the practically prepared Fe-Ga alloys were quite small at present. In order to improve magnetostrictive properties of the Fe-Ga alloy, the Fe83Ga17Cex (x=0.0, 0.2, 0.4, 0.6, 0.8, 1.0) alloys were prepared by non--consumable vacuum arc melting furnace using high purity elements under a protective argon atmosphere. The crystal structures and surface morphologies of the alloys were intensively studied by X--ray diffraction (XRD) and scanning electron microscopy (SEM) combined with energy—dispersive spectroscopy (EDS), respectively. The magnetostriction coefficients of the alloys were measured by means of the resistance strain method. The results showed that Fe83Ga17 alloy is composed only of a single phase of A2 with bcc structure. However, the Fe83Ga17Cex alloys are composed of the A2 phase and a small amount of CeFe2 secondary phase with MgCu2 structure except the alloy with x=0.2, which is composed only of a single phase of A2. Furthermore, the microstructure of the Fe83Ga17 alloy presents the equiaxial morphology with coarse grains. However, the microstructure of the Fe83Ga17Ce0.8 alloy is a columnar structure with fine grains. Compared with the Fe83Ga17 alloy, the magnetostriction coefficients of the Fe83Ga17Cex alloys are increased significantly except the alloy with x=0.2. The magnetostriction coefficient of the Fe83Ga17Ce0.2 alloy (81×10-6) is slightly smaller than that of the Fe83Ga17 alloy (84×10-6). With the increase of the rare earth Ce content, the magnetostriction coefficients of the Fe83Ga17Cex alloys increase firstly and then decrease. When x=0.8, the maximum magnetostriction coefficient of 356×10-6 is obtained at the magnetic field of 557 kA/m.For the Fe83Ga17Cex alloys except the alloy with x=0.2, the noticeable increase of the magnetostriction coefficients derives from the following reasons: (1) the secondary phase of CeFe2 with MgCu2 structure appears and increases with the increase of the rare earth Ce content in the alloys. (2) the preferred orientation along <100>of A2 phase of the Fe83Ga17Cex alloy is more favorable to the increase of magnetostriction coefficient of Fe-Ga alloy. As for the Fe83Ga17Ce0.2 alloy, the decrease of magnetostriction coefficient is attributed to the fact that the rare earth Ce dissolves in the Fe-Ga alloy and forms the solid solution alloy.

 
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YAO Zhanquan
ZHAO Zengqi
JIANG Liping
HAO Hongbo
WU Shuangxia
ZHANG Guangrui
YANG Jiandong

Cite this article: 

YAO Zhanquan, ZHAO Zengqi, JIANG Liping,HAO Hongbo, WU Shuangxia,ZHANG Guangrui, YANG Jiandong. EFFECTS OF Ce ADDITION ON THE MICROSTRUCTURE AND MAGNETOSTRICTION OF Fe83Ga17 ALLOY. Acta Metall Sin, 2013, 49(1): 87-91.

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2012.00498     OR     https://www.ams.org.cn/EN/Y2013/V49/I1/87

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