Abstract: The rapidly-quenched NdFeB magnetic powders were surface-treated. Two kinds of NdFeB magnets based on metal and plastic were prepared by cold molding and hot molding, respectively. The service temperature and magnetic properties before and after the surface treatment with different matrix were studied.The results 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℃.
Magnetic properties and service temperature of bonded NdFeB magnetic composites
Abstract:
The rapidly-quenched NdFeB magnetic powders were surface-treated. Two kinds of NdFeB magnets based on metal and plastic were prepared by cold molding and hot molding, respectively. The service temperature and magnetic properties before and after the surface treatment with different matrix were studied.The results 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?℃.