【作者】 刘旭波； 梁洁； 岳明； 韩景智； 肖耀福； 王润；

【Author】 LIU Xu-bo;LIANG Jie;YUE Ming;HAN Jing-zhi;XIAO Yao-fu;WANG Run School of Mater. Sci. & Eng., University of Science and Technology of Beijing, Beijing, 100083, China; Beijing Keguang Magnetic Materials Co. Ltd., Beijing, 100083, China

【机构】 北京科技大学材料学院； 北京科光磁性材料有限公司；

【摘要】 研究了改进“氢化-歧化-脱氢-再复合”（简称HDDR）工艺制造的各向异性Nd₁₃Fe_60.9Co₁₈B₇Ga₁Zr_0.1 磁粉的组织与磁特性。结果发现,上述磁粉的磁特性对脱氢-再复合温度敏感。其典型性能为B_r=1.2T,H_ci=920kA/m,（BH）m= 248kJ/m³。组织研究表明,在300～400nm 大小的Nd₂（Fe,Co）₁₄B 晶粒内部存在尺寸10nm 左右的Nd（Fe,Co）₂相,其形成与HDDR 相变的非平衡转变特点有关。更多还原

【Abstract】 The paper deals with the magnetic properties and microstructure for anisotropic Nd₁₃Fe_60.9Co₁₈B₇Ga₁Zr_0.1powders prepared by modified hydrogenation- decomposition-desorption-recombination process （HDDR）. It is foundthat the magnetic properties for anisotropic Nd₁₃Fe_60.9Co₁₈B₇ Ga₁Zr_0.1 powders are sensitive to recombinationtemperature, which possess a typical magnetic property of B_r=1.2T, H_ci=920kA/m, （BH）m= 248kJ/m³. Themicrostructure analysis reveals that some Nd（Co,Fe）₂ fine particles with a size of 10nm exist in Nd₂（Fe,Co）₁₄B phasewith a crystal grain size of 300-400nm. The emergence of Nd（Co,Fe）₂ may be caused by dynamical behavior ofHDDR process.更多还原