Effect of gallium addition on magnetic properties of Nd2Fe14B-based/α-Fe nanocomposite magnets

被引：0
|
作者：
Zhang Shiyan [1 ]
Xu Hui [1 ]
Ni Jiansen [1 ]
Wang Hailong [1 ]
Bai Qin [1 ]
Dong Yuanda [1 ]
机构：
[1] Shanghai Univ, Inst Mat, Shanghai 200072, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2007年 / 25卷 / 01期
关键词：
magnetic properties; nanocomposite magnets; Ga addition; crystallization behavior; rare earths;
D O I：
暂无
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The influence of Ga addition on the crystallization behavior and the magnetic properties of nanocomposite Nd2Fe14B-based/alpha-Fe magnets was investigated. It was found that the addition of 0.2% did not change the crystallization temperature of amorphous alloy, but the magnetic properties were improved significantly because of the strong exchange coupling interaction between the hard and soft magnetic phases. The optimum magnetic properties with H-i(c) = 600.3 kA(.)m(-1), Br=0.75 T, and (BH)(max) = 88.03 kJ(.)m(-3) were obtained in bonded Nd-9.5(FeCoZr)(83.8)Ga0.2B6.5 magnet with 15 m(.)s(-1) wheel speed and 670 degrees C annealing treatment. The apparent improvement of magnetic proper-ties originates from the grain refinement calculated using the Scherrer formula from corresponding XRD patterns and the excellent rectangularity of the demagnetization curve.
引用
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页码：74 / 78
页数：5
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