THE MOSSBAUER-EFFECT ON FE-57 NUCLEI IN ALLOYS FOR PERMANENT-MAGNETS BASED ON ND-(FE,CO,M)-B (M=AL,TI)

The Mossbauer effect on Fe-57 nuclei was used to investigate at room t emperature alloys of the Nd-Fe-Co-M-B system (M = Al, Ti) in the cast and rapidly solidified conditions, as well as sintered permanent magne ts made of these alloys. The appearance and the structure of Mossbauer spectra are independent of the condition of specimens made of the all oys of the same composition. Addition of Al into the Nd-Fe-B-Co alloy leads to the selective occupation of Fe sites in the lattice of Nd-2(F e, Co)(14)B, whereas titanium does not virtually dissolve in the latti ce of the major, magnetically hard phase.