MAGNETIC HARDENING OF MECHANICALLY MILLED SM2FE14GA3C2

The effect of mechanical milling and annealing on the structure and ma gnetic properties of Sm2Fe14Ga3C2 has been studied. Milling was found to lead to the formation of an amorphous phase. Annealing at temperatu res above 700-degrees-C resulted in formation of nanocrystalline SM2Fe 14Ga3C2 phase having the Th2Zn17 structure and isotropic magnetic beha viour with coercivities of up to 13 kOe. It has been also shown that a nisotropic powders with coercivities of 4-5 kOe can be prepared using low energy milling and subsequent heat treatment.