Effect of the Boron Content on the Amorphization Process and Magnetic Properties of the Mechanically Alloyed Fe{sub 92−x}Nb{sub 8}B{sub x} Powders
- Université Badji Mokhtar Annaba, Laboratoire de Magnétisme et Spectroscopie des Solides (LM2S), Département de Physique (Algeria)
- Universitat de Girona, Departament De Fisica (Spain)
- Université Grenoble Alpes, Institut NEEL, CNRS (France)
The effect of the B content on the microstructural, structural, and magnetic properties of partially amorphous Fe{sub 92−x}Nb{sub 8}B{sub x} (x = 5, 10, 15, and 20) alloys has been investigated by means of scanning electron microscopy, X-ray diffraction, high and low-temperature extraction-type magnetometers. The XRD results reveal the formation of a nanocomposite structure where nanocrystalline bcc α-Fe and Fe{sub 2}B phases are embedded into an amorphous matrix. The FeB boride is observed for higher boron contents (x = 15 and 20), and the crystallite sizes are in the range of 7–24 nm. As the B content increases, the amorphous phase-relative proportion and coercivity increase, whereas the saturation magnetization decreases. An important magnetic hardening occurs by lowering the temperature from 400 to 5 K for x = 20% B. The variation of the Curie temperature can be attributed to the heterogeneity of the amorphous matrix.
- OSTI ID:
- 22921345
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 4 Vol. 32; ISSN 1557-1939
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMORPHOUS STATE
BCC LATTICES
BORON COMPOUNDS
COERCIVE FORCE
CURIE POINT
EXTRACTION
IRON COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIZATION
MAGNETOMETERS
MICROSTRUCTURE
NANOCOMPOSITES
NANOSTRUCTURES
NIOBIUM COMPOUNDS
SATURATION
SCANNING ELECTRON MICROSCOPY
TEMPERATURE RANGE 0000-0013 K
TERNARY ALLOY SYSTEMS
X-RAY DIFFRACTION