Sm_3(Fe_(bal)Cr_(0.11)V_(0.069))_(29)N_x纳米复合永磁材料的新工艺尝试  

New Process of Nanometer Compound Sm_3(Fe_(bal)Cr_(0.11)V_(0.069))_(29)N_x Permanent-Magnet Material

作　　者：李林[1] 崔春翔[1] 孙继兵[1] 杨伟[1] 吴瑞国[1] 

机构地区：[1]河北工业大学材料科学与工程学院,天津300130

出　　处：《稀有金属》2006年第5期695-698,共4页Chinese Journal of Rare Metals

摘　　要：对3：29型纳米复合永磁材料的研究表明： 纳米晶复合永磁材料的磁性能取决于两个主要方面. 一是要求硬磁相有尽可能高的内禀矫顽力和尽可能高的磁晶各向异性; 二是硬磁相和软磁相均要求有晶粒细小且分布均匀的显微结构特别是软磁相晶粒尺寸尽可能达到纳米尺寸. 通过对非晶态的快淬合金粉末进行400 ℃预退火8 min处理, 以及在1.0～1.2 Mpa的氮气气氛、 750 ℃温度下晶化10 min, 然后直接降温至550 ℃, 进行氮化, 较好地控制了晶粒的不均匀长大, 使氮化进行得更加充分, 显著地改善了合金氮含量.The study of 3 ： 29 type nanometer compound permanent-magnet material indicates that magnetic properties of nanometer compound permanentmagnet material chiefly lie on two factors. One is that the hard magnet phase must bear intrinsic coercive force as high as possible. Another is that the hard phase and the soft phase both have microstructure with crystal grain of fine and homogeneous, and the size of crystal grain had better within magnitude of nanometer. Pre-annealing 8 min at 400℃, crystallization 10 rain under nitrogen pressure of 1.0 - 1.2 MPa at 750 ℃, and then cooling straightway to the temperature of 550 ℃ to nitriding alloy powder. The experimentation shows that the size of the crystal grain can be controlled, and alloy powder can be nitrided adequately.

关 键 词：交换耦合 纳米复合永磁材料 矫顽力 非晶 

分 类 号：TM273[一般工业技术—材料科学与工程]