Preferred Orientation in Nanocomposite Permanent Magnet Materials
来源期刊：JOURNAL OF RARE EARTHS2006年第1期
论文作者：Sun Guangfei Pang Lijia Zhang Jinbiao Qiang Wenjiang Chen Jufang Li Wenan
Key words：nanocomposite magnets; preferred orientation; texture; alignment degree; rare earths;
Abstract: Melt-spun (Nd11.4Fe82.9B5.7)0.99M1 ribbons (M=Zr, Nb, Ga, Zr+Ga, Nb+Ga) were prepared by melt-spinning technique. Ga addition is found to be effective for the orientation of c-axis of Nd2Fe14B grains perpendicular to the ribbon plane. Better magnetic properties can be achieved by adding both the two kinds of elements Zr+Ga, Nb+Ga, and it is found that the preferred orientation is further improved. The alignment degree changes with ribbon thickness and is highest when ribbon thickness is 120 μm. Heat treatment can improve the texture degree, but lead to coarser grains. Cryogenic treatment is first applied for the treatment of nanocomposite Nd2Fe14B/α-Fe melt-spun ribbons. The effects on magnetic properties and texture degree of nanocomposite magnets after cryogenic treatment were studied. The result shows that cryogenic treatment is beneficial to the enhancement of texture degree of melt-spun ribbon and the grain size has no obvious change.
Sun Guangfei1，Pang Lijia1，Zhang Jinbiao2，Qiang Wenjiang1，Chen Jufang1，Li Wenan2
(1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2.Yuhong Magnetic Powders Corporation, Guangdong 529100, China)
Abstract:Melt-spun (Nd11.4Fe82.9B5.7)0.99M1 ribbons (M=Zr, Nb, Ga, Zr+Ga, Nb+Ga) were prepared by melt-spinning technique. Ga addition is found to be effective for the orientation of c-axis of Nd2Fe14B grains perpendicular to the ribbon plane. Better magnetic properties can be achieved by adding both the two kinds of elements Zr+Ga, Nb+Ga, and it is found that the preferred orientation is further improved. The alignment degree changes with ribbon thickness and is highest when ribbon thickness is 120 μm. Heat treatment can improve the texture degree, but lead to coarser grains. Cryogenic treatment is first applied for the treatment of nanocomposite Nd2Fe14B/α-Fe melt-spun ribbons. The effects on magnetic properties and texture degree of nanocomposite magnets after cryogenic treatment were studied. The result shows that cryogenic treatment is beneficial to the enhancement of texture degree of melt-spun ribbon and the grain size has no obvious change.
Key words:nanocomposite magnets; preferred orientation; texture; alignment degree; rare earths;
【全文内容正在添加中】
