In this presentation, an overview of our development, improvement, and applications of hot-deformed NdFeB magnets and rare earth bonded magnets is presented. Taking advantage of nanometer-size microstructures and a unique grain orientation mechanism, hot-deformed magnets with coercivities over 560 kA/m at 150°C are now available without the addition of heavy rare earths. In addition to radially oriented rings, axially oriented plates have been developed for applications such as HEV traction motors. For bonded magnets, the status of NdFeB and SmFeN bonded magnets is given, including our special molding techniques for high-reliability automotive applications. In addition, our new PLP (press-less process) sintered NdFeB will be introduced.
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