Effect of Cobalt on HDDR Anisotropic NdFeB
来源期刊：JOURNAL OF RARE EARTHS2002年第6期
论文作者：王润 张正义 肖耀福 岳明 刘旭波
Key words：rare earths; Co; HDDR NdFeB; anisotropy;
Abstract: The effect of cobalt on the magnetic properties and anisotropy of HDDR anisotropic NdFeB was studied. It is found that Co is helpful for preparing anisotropic NdFeB with high coercivity. The research on the initial microstructure for NdFeB alloy indicates that Co tends to enter the crystal lattice of Nd-rich phase and some of Co atoms also enter the crystal lattice of Nd2Fe14B. The dissolution of Co changes the stability of Nd-rich phase and Nd2Fe14B in H2 atmosphere and affects the kinetics of HDDR phase transformation. As a result, the NdFeB powder exhibits a high coercive force and a strong anisotropy.
王润1，张正义1，肖耀福1，岳明1，刘旭波1
(1.School of Material Science & Engineering, University of Science & Technology Beijing, Beijing 100083, China)
Abstract:The effect of cobalt on the magnetic properties and anisotropy of HDDR anisotropic NdFeB was studied. It is found that Co is helpful for preparing anisotropic NdFeB with high coercivity. The research on the initial microstructure for NdFeB alloy indicates that Co tends to enter the crystal lattice of Nd-rich phase and some of Co atoms also enter the crystal lattice of Nd2Fe14B. The dissolution of Co changes the stability of Nd-rich phase and Nd2Fe14B in H2 atmosphere and affects the kinetics of HDDR phase transformation. As a result, the NdFeB powder exhibits a high coercive force and a strong anisotropy.
Key words:rare earths; Co; HDDR NdFeB; anisotropy;
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