Behavior of Additive Elements for Nd-Fe-B Alloy Powder Produced by Reduction-diffusion Method with Metallic Ca

摘要

An experimental study was carried out on someadditive elements for Nd-Fe-B alloy powder produced byreduction-diffusion method(R-D) using metallic Ca as reductant.Pr, Dy, Ni, Co, V, and Mo were selected as additive elements. Prand Dy replaced Nd in Nd2Fe14B. However, DyFe3 appeared as theDy content increased. Ni and Co replaced Fe in Nd2Fe14B and Ndrich phase, and improved the corrosion resistance of Nd-Fe-Balloy powder. V and Mo were able t be dispersed in Nd-Fe-B alloypowder by using atomized Fe powder including V or Mo as rawmaterial. The grain growth in the sintered magnet materialproduced by using Mo-dispersed Nd-Fe-B alloy powder was able to be resisted.