Production and corrosion resistance of NdFeBZr magnets with an improved response to thermal variations during sintering

►This study describes an attempt to produce NdFeB magnets that are insensitive to the sintering temperature. ► It was found that addition of Zr to NdFeB magnets significantly augmented the thermal stability of this magnetic material during sintering at high temperature; even at industrial scale. ► The magnetic properties of the resulting magnets were: (BH)m=403.8 kJ m−3 (±4.7 kJ m−3), Br=1430 mT (±9 mT) and iHc=907 kA m−1 (±12 kA m−1).