(洛阳工学院 材料科学与工程系， 洛阳 471003)
摘 要: 对磁粉进行表面处理，利用冷、热模压法制备了金属基及塑料基两种粘结NdFeB 磁体，研究了表面处理前后及不同基体磁体的使用温度和磁性能。研究结果表明：磁粉的表面处理可以提高磁体的磁性能及使用温度，塑料基磁体的磁性能低于金属基磁体的，但其使用温度却较高，可达180℃左右。
关键字: 表面处理；粘结；NdFeB；磁性材料；使用温度；性能
temperature of bonded NdFeB
magnetic composites
（Department of Materials Science and Engineering,
Luoyang Institute of Technology, Luoyang 471039，China）
Abstract:The rapidly-quenched NdFeB magnetic powders were surface-treated. Two kinds of NdFeB magnets based on metal an d plastic were prepared by c old molding and hot molding, respectively. The service temperature and magnetic properties before and after the surface treatment with different matrix were studied. The result s show that the temperature stability and the magnetic properties of the magnets can be improved by the surface treatment of the magnetic powders. The magnetic properties of the magnets based on plastic are lower than those based on metal, but the service temperature of the magnets based on the plastic is increased greatly. Its usable temperature can reach 180℃.
Key words: surface treatment; bond; NdFeB; magnetic materials; service temperature; properties
