Development of Rare-Earth Free Mn-Al Permanent Magnet Employing Powder Metallurgy Route

摘要

Most widely used high-performance permanent magnets are currently based on intermetallics of rare-earths in combination with Fe and Co. Rare-earth elements required for these magnets are getting expensive by the day. Consequently, there is a thrust worldwide to develop economical rare-earth free permanent magnets. It is acknowledged that the phase in Mn-Al alloys possesses magnetic properties without the presence of ferromagnetic elements such as Fe, Co, and Ni. In the present study, we report the synthesis of magnetic phase of Mn_(54)Al_(46) alloy synthesized using mechanical alloying followed by solutionizing and annealing to obtain the desired magnetic phase.