NdFeB Magnet Formed by Binder-less Net Shaping Process

Abstract

The recent needs for safe and secure automobiles and energy-saving appliances have increased the demand for high-efficiency motors and high-sensitivity sensors. While the performance of these devices largely depends on the intrinsic properties of the magnet materials used in the devices, it is also important to improve the flexibility of the magnet in order to form them into complicated shapes and the durability for usage in high temperatures or severe environments. Although resin-bonded Nd-Fe-B magnets are known for their good formability, they lack in durability due to the poor heat resistance of resin. To overcome this challenge, we have developed a new process that enables the net-shape forming of plastic deformable magnet powder and created a resin-free bonded Nd-Fe-B magnet with a high heat resistance and a recyclability.