HARD MAGNETIC-PROPERTIES OF NDFE10.5V1.5NX POWDERS WITH HIGH-PERFORMANCE

High-performance powders of NdFe10.5V1.5Nx with B-x = 10.8 kG, H-cJ = 4.3 kOe, (BH)(max) = 17.2 MGOe, and T-c > 800 K were successfully prep ared by using conventional milling process. The relationship of the cr ystallographic structure and the intrinsic magnetic properties to the nitrogen content is investigated. It is found that the nitrogen conten t is vital to obtain high-performance magnetic powders based on NdFe10 .5V1.5Nx In comparison with quenching Nd-Fe-B powders, NdFe10.5V1.5Nx powders are characterized by a larger maximum-energy product and a low er cost. Obviously, it is of significance in permanent magnet applicat ions. (C) 1998 Elsevier Science B.V. All rights reserved.