INVESTIGADORES
SIRKIN Hugo Ricardo Mario
artículos
Título:
Metastable Phases in Recrystallised RE4.5+xFe77-xB18.5 (x=0,1) Nanocomposite Ribbons and its Dependence on Cooling Rates
Autor/es:
F. D. SACCONE, H. SIRKIN Y F. H. SÁNCHEZ
Revista:
JOURNAL OF METASTABLE AND NANOCRYSTALLINE MATERIALS
Editorial:
Trans Tech Publications, Switzerland
Referencias:
Año: 2004 vol. 20-1 p. 482 - 487
ISSN:
1422-6375
Resumen:
Nanocomposite magnetic ribbons of RE4.5+xFe77-xB18.5 (RE= rare earth, x= 0, 1) were
prepared by melt-spinning. Mischmetal alloy was employed as the rare earth component.
Nanometric scale crystallisation was obtained by direct quenching onto a copper wheel rotating at a
surface velocity of 22 m/s, or after thermal annealing of amorphous ribbons produced at 44 m/s.
The presence of a mixture consisting of iron and iron boride phases in crystalline samples was
determined by X-ray diffraction and Mössbauer spectroscopy. Diluted RE atoms were found inside
the boride structure. A lattice expansion of 10 % in vol. was estimated for t-(Fe, RE)3B, mainly due
to distortion in the c-axis direction.
Magnetic properties of amorphous and crystalline ribbons were measured. Results are discussed
in terms of the observed structural changes.
to distortion in the c-axis direction.
Magnetic properties of amorphous and crystalline ribbons were measured. Results are discussed
in terms of the observed structural changes.
prepared by melt-spinning. Mischmetal alloy was employed as the rare earth component.
Nanometric scale crystallisation was obtained by direct quenching onto a copper wheel rotating at a
surface velocity of 22 m/s, or after thermal annealing of amorphous ribbons produced at 44 m/s.
The presence of a mixture consisting of iron and iron boride phases in crystalline samples was
determined by X-ray diffraction and Mössbauer spectroscopy. Diluted RE atoms were found inside
the boride structure. A lattice expansion of 10 % in vol. was estimated for t-(Fe, RE)3B, mainly due
to distortion in the c-axis direction.
Magnetic properties of amorphous and crystalline ribbons were measured. Results are discussed
in terms of the observed structural changes.
to distortion in the c-axis direction.
Magnetic properties of amorphous and crystalline ribbons were measured. Results are discussed
in terms of the observed structural changes.
4.5+xFe77-xB18.5 (RE= rare earth, x= 0, 1) were
prepared by melt-spinning. Mischmetal alloy was employed as the rare earth component.
Nanometric scale crystallisation was obtained by direct quenching onto a copper wheel rotating at a
surface velocity of 22 m/s, or after thermal annealing of amorphous ribbons produced at 44 m/s.
The presence of a mixture consisting of iron and iron boride phases in crystalline samples was
determined by X-ray diffraction and Mössbauer spectroscopy. Diluted RE atoms were found inside
the boride structure. A lattice expansion of 10 % in vol. was estimated for t-(Fe, RE)3B, mainly due
to distortion in the c-axis direction.
Magnetic properties of amorphous and crystalline ribbons were measured. Results are discussed
in terms of the observed structural changes.
to distortion in the c-axis direction.
Magnetic properties of amorphous and crystalline ribbons were measured. Results are discussed
in terms of the observed structural changes.
3B, mainly due
to distortion in the c-axis direction.
Magnetic properties of amorphous and crystalline ribbons were measured. Results are discussed
in terms of the observed structural changes.
