Behavior of addition elements for Nd-Fe-B alloy powder 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 using metallic Ca as reductant. Pr, Dy,Ni, Co, Ni and Mo were selected as additive elements.Pr and Dy replaced Nd in Nd_2Fe_14B. However, DyFe_3appeared as the Dy content increased. Ni and Co replaced Fe inNd_2Fe_14 and Nd rich phase, and improved the corrosionresistance of Nd-Fe-B alloy powder. V and Mo were able to bedispersed in Nd-Fe-B alloy powder by using atomized Fe powderincluding V or Mo as raw material. The grain growth in thesintered magnet material produced by using Mo-dispersed Nd-Fe-B alloy powder was able to be resisted.