Nanocrystallite compositions for Al- and Mo-containing Finemet-type alloys

Abstract New composite soft magnetic alloys in the compositional series Fe73.5−xAlxSi13.5B9Cu1Mo3 were recently obtained by partial thermal devitrification of amorphous ribbons. We report the results of Mossbauer and X-ray diffraction (XRD) investigations of nanocrystalline alloys containing 0, 2, 4, 6 and 8 at.% Al, following annealing at 560°C for 1 h. The results indicate that most of the Si and Al are located in the cubic-DO3Fe(Si,Al) crystallites, after the primary crystallization is achieved.