X-ray crystallography and Mössbauer spectroscopy were used to investigate the crystallization of the amorphous Fe100-xBx alloys, 14 ≤ x ≤ 20 annealed at 615 K. As a result of the heat treatment, the formation of crystalline α-Fe and Fe3B were observed. Variations in the values of the isomer shift and the orientation of the axis of magnetization indicate changes in the iron-boron bonding and the local atomic arrangement. Formation of the α-Fe phase was determined as a function of boron concentration and annealing time. Crystallization rates of that phase were observed to be dependent on boron concentration and on the annealing time. The average hyperfine field of the untreated samples was observed to increase till x = 17 after which it decreased. This is explained in terms of the Invar behavior of Fe83B17. The anomalous crystallization of Fe86B14 is proposed to be due to the existence of interstitial-like boron sites in a near bcc short range atomic structure.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry