Study on the Microstructure of Hot-Pressed and Hot-Deformed Nd-Fe-B Magnets
【摘要】:Anisotropic nano-crystalline Nd-Fe-B magnets were prepared by applying the MQ-C melt-spun powders and the technique of hot-pressing(HP)and hot-deformation(HD).The change of magnetic properties and microstructure was studied in detail.The results showed that:the HD magnets had a good c-axis texture and the magnetic properties increased largely;the MQ-C powder stacked well along the pressure direction during HP,and the powder particles elongated perpendicular to the pressure direction during HD;in HD magnets,there were a lot of unoriented and coarse grains,which had a higher Nd content than the plate-like grains.