Micro-structure-influence research on the double phase nano-composite permanent magnet

Micro-structure-influence research on the double phase nano-composite permanent magnet

As new permanent magnets, double-phase nanocomposite permanent magnets have recently attracted considerable attention. This type of alloys integrates advantages of hard magnetic phase??s high magnetocrystalline anisotropy and soft magnetic phase??s high saturation magnetization, and obtains the excellent magnetic properties through exchange-coupled interaction on a scale of the order nm. Theoretical estimation indicates that double-phase nanocomposite permanent magnet material??s energy product may reach as high as 800kJ/m3, higher than any kind of single-phase permanent-magnet material. This kind of material also has characteristics of low rare earth content and good chemical stability, Therefore, it is of great practical value and to be the new generation of low price caking permanent-magnet material, it will have promising application prospect.
Firstly, this author studied the take-shape craft of double-phase nanocomposite permanent magnet material, including the performance by pressure and time??s maintenance to magnet??s density and the magnetism.
The result indicates that the magnet density increases along with the pressure and time. The magnet density reaches the biggest one when pressure is 600MPa and time is 150s. When the pressure or the time is continually increased, the magnet density will no longer increase, there is possibility to create break interior and reduce the production efficiency. This suppressed craft was still used in following experiments.