Abstract
The influence of Gd addition on the structural properties of FeCuNbSiB nanocrystallized and amorphous alloys is studied. The crystallization temperature increases and the microstructure of the annealed samples changes. Gd addition induces the formation of GdFeB phases. In fully crystallized FeGdCuNbSiB alloys the α-Fe(Si), FeNbB, Gd 3Fe 62B 14 and Gd 1.1Fe 4B 4 phases are observed. The evolution of the microstructure is followed as a function of the cumulative effects of annealing time and temperature. The results suggest the transformation of the metastable Gd 3Fe 62B 14 phase into Gd 1.1Fe 4B 4 and α-Fe. The hyperfine parameters of the Gd 3Fe 62B 14 Mössbauer contribution are reported.
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