Effect of In-Situ Nano-NbC Intergranular Addition on Magnetic Properties and Corrosion Resistance of Hot-Deformed NdFeB Magnet
WANG Shengchuan
LI Xiaoqiang
SONG Bo
WANG Xuegeng
WANG Zhiwei
NI Junjie
Abstract：Through the in-situ formation of nano-NbC in hot deformed NdFeB magnets,the effect of nano-NbC content on magnetic properties and corrosion resistance was investigated.The results show that in-si-tu nano-NbC can effectively improve the magnetic properties of NdFeB.When the mass fraction is 0.10％,the residual magnetism,magnetic energy product,and comprehensive magnetic properties are the highest,which is attributed to the improved distribution of strip-shaped Nd-rich phases at the grain boundaries and the enhanced magnetic crystal orientation.In addition,NbC is also beneficial for the enhanced corrosion resistance of magnets.When its mass fraction is 0.10％,the charge transfer resistance is highest,the cor-rosion current density is lowest,and the corrosion resistance of magnets is best.This is related to the ob-struction of charge transfer and the hinderance of Nd/Fe oxidation by nano-NbC.Such discoveries provide useful reference for the development of high-quality rare earth permanent magnet materials.
Keywords：NdFeB magnetNbCmagnetic propertiescorrosion resistance
Publication Date：2025-04-27
Online Publishing Date：2026-08-28(First online date of this platform, not the publication date of the document)
Pages：9( 251-258,306 )