A SAMARIUM IRON NITRIDE MAGNET FABRICATED BY SHOCK-COMPACTION TECHNIQUE

A samarium-iron nitride Sm2Fe17N3 powder was shock-consolidated by usi ng a propellant gun with metal-plate impactor system. Disk-like magnet s were consolidated under each experimental condition. At an optimum c ondition in this study, apparent density of shock-compacted Sm2Fe17Nx magnets was 97% of solid density, and X-ray diffraction patterns of th ese magnets showed no appearance of the decomposition of rhombohedral Sm2Fe17Nx structure. The highest value of the maximum energy product o btained so far was 10.5 MG.Oe. Microstructural analyses suggested the possibility of improving magnetic properties of the magnets.