热变形Nd-Fe-B磁体研究现状与发展趋势

In this paper,development of hot pressing technology and device is reviewed. The use of glove-box filled with argon and equipped with Joule-heating compaction contributes to mass production of hot-deformed magnet. Backward extrusion technology is an idea method to fabricate radially oriented high energy product anisotropic Nd-Fe-B ring magnet. Two common shapes of green body can be used to categorize these fabrication routes: ring-shaped and cylindrical magnets extrusion. The grain boundary diffusion process is an efficiently way to improve coercivity of hot-deformed magnet.