FABRICATION AND MEASUREMENTS ON POLYMER BONDED NDFEB MAGNETS

This paper presents measurements on polymer bonded NdFeB permanent mag nets. These permanent magnets are fabricated by mixing NdFeB ribbons a nd binder epoxy resin under 5 ton/cm(2) pressure. The ribbons of NdFeB alloy are prepared by melt-spinning process. The performances of ribb on quenched at different rates and polymer bonded magnet are investiga ted by x-ray diffraction, DTA, SEM and VSM. The crystal lattice consta nts of the main phase Nd2Fe14B are found to be a=8.73 Angstrom, c=12.4 8 Angstrom. Effect of annealing at different temperature and time are also investigated.