| abstract |
The invention discloses a neodymium-iron-boron permanent magnet material, comprising a permanent magnet material body and a layer of anti-corrosion coating with a thickness of 5-15 μm coated on the permanent magnet material body; the permanent magnet material body is made of Nb, Fe, B, rare earth elements, Se, fullerenes and M; the M is composed of Ni, Co, Sb, Ca in mass ratio 1:(0.8-1.2):(0.2-0.4):(0.08-0.12) The mixture formed by mixing; the mass ratio of Nb, Fe, B, rare earth element, Se, fullerene, and M is (10-15):(65-75):(0.5-0.8):(3-6) :(0.01-0.04):(0.1-0.3):(0.5-3); The anti-corrosion coating is composed of the following materials by weight: N-(4-cyano-3-trifluoromethylphenyl) 35-55 parts of methacrylamide/3-(1,1-difluoroallyl)quinoxaline-2-alcohol/glycidyl methacrylate copolymer, 2,4-diamino-6-phenyl -1,3,5-triazine 4-6 parts, 2,2-bis[4-(4-aminophenoxy)phenyl]-1,1,1,3,3,3-hexafluoropropane 1 ‑3 parts, solvent 25‑35 parts. The NdFeB permanent magnet material disclosed by the invention has good comprehensive magnetic properties and good corrosion resistance. |