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Title: Magnetic properties of Sm{sub 5}Fe{sub 17} melt-spun ribbon

Abstract

The relationship between the structures and magnetic properties of Sm{sub 5}Fe{sub 17} melt-spun ribbons was studied. The melt-spun ribbons obtained by annealing of amorphous Sm{sub 5}Fe{sub 17} melt-spun ribbon consisted of the Sm{sub 5}Fe{sub 17} phase when annealed at 973 K for 0 h (i.e., when the furnace was immediately turned off after heating) or the Sm{sub 5}Fe{sub 17} phase together with a small amount of the SmFe{sub 12} phase when produced by annealing at 973 K for 1 h. The coercivity of the annealed Sm-Fe melt-spun ribbons was strongly dependent on the annealing conditions. The maximum coercivity of the annealed Sm{sub 5}Fe{sub 17} melt-spun ribbons exceeded 36 kOe.

Authors:
 [1]
  1. Department of Mechanical Science and Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016 (Japan)
Publication Date:
OSTI Identifier:
20982867
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 101; Journal Issue: 9; Conference: 10. joint MMM/INTERMAG conference, Baltimore, MD (United States), 7-11 Jan 2007; Other Information: DOI: 10.1063/1.2711397; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANNEALING; BINARY ALLOY SYSTEMS; COERCIVE FORCE; FURNACES; IRON ALLOYS; MAGNETIC MATERIALS; MAGNETIC PROPERTIES; PERMANENT MAGNETS; SAMARIUM ALLOYS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0400-1000 K; TIME DEPENDENCE

Citation Formats

Saito, Tetsuji. Magnetic properties of Sm{sub 5}Fe{sub 17} melt-spun ribbon. United States: N. p., 2007. Web. doi:10.1063/1.2711397.
Saito, Tetsuji. Magnetic properties of Sm{sub 5}Fe{sub 17} melt-spun ribbon. United States. doi:10.1063/1.2711397.
Saito, Tetsuji. Tue . "Magnetic properties of Sm{sub 5}Fe{sub 17} melt-spun ribbon". United States. doi:10.1063/1.2711397.
@article{osti_20982867,
title = {Magnetic properties of Sm{sub 5}Fe{sub 17} melt-spun ribbon},
author = {Saito, Tetsuji},
abstractNote = {The relationship between the structures and magnetic properties of Sm{sub 5}Fe{sub 17} melt-spun ribbons was studied. The melt-spun ribbons obtained by annealing of amorphous Sm{sub 5}Fe{sub 17} melt-spun ribbon consisted of the Sm{sub 5}Fe{sub 17} phase when annealed at 973 K for 0 h (i.e., when the furnace was immediately turned off after heating) or the Sm{sub 5}Fe{sub 17} phase together with a small amount of the SmFe{sub 12} phase when produced by annealing at 973 K for 1 h. The coercivity of the annealed Sm-Fe melt-spun ribbons was strongly dependent on the annealing conditions. The maximum coercivity of the annealed Sm{sub 5}Fe{sub 17} melt-spun ribbons exceeded 36 kOe.},
doi = {10.1063/1.2711397},
journal = {Journal of Applied Physics},
number = 9,
volume = 101,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}
  • An investigation of the synthesis of the (Sm{sub 1-x}Y{sub x}){sub 5}Fe{sub 17} (x = 0 to 0.5) phase and its magnetic properties is presented. (Sm{sub 1-x}Y{sub x}){sub 5}Fe{sub 17} (x = 0 to 0.5) melt-spun ribbons that fully or mainly consisted of the amorphous phase and which showed low coercivity were prepared. Heat treatment of the melt-spun ribbons resulted in the formation of the (Sm,Y){sub 5}Fe{sub 17} phase. The highest remanence, 50 emu/g, was achieved in the annealed (Sm{sub 0.7}Y{sub 0.3}){sub 5}Fe{sub 17} melt-spun ribbon. However,the annealed (Sm{sub 1-x}Y{sub x}){sub 5}Fe{sub 17} (x = 0.4 to 0.5) melt-spun ribbons didmore » not contain the (Sm,Y){sub 5}Fe{sub 17} phase and showed low coercivity values.« less
  • Vanadium substituted Sm[sub 10](Fe,V)[sub 90] alloys were prepared by a single roller rapid-quenching method. The melt-spun Sm[sub 10]Fe[sub 82.5]V[sub 7.5] alloy showed the TbCu[sub 7]-type structure for a wide range of wheel speeds between 15 and 50 m/s, while the Sm[sub 10]Fe[sub 90] binary alloy showed the same structure at wheel speeds over 45 m/s. It was found that the substitution of vanadium for iron in Sm[sub 10](Fe,V)[sub 90] alloys gives a greater range of stability of the TbCu[sub 7]-type structure. Nitrogenation was carried out by heating alloy powders in nitrogen gas. The magnetic properties of Sm[sub 10]Fe[sub 82.5]Vs[sub 7.5]N[submore » t], powder nitrogenated at 773K for 6 h were: J[sub r] = 0.71T, H[sub cJ] = 535 kA/m (6.7 kOe), and (BH)[sub max] = 63.7 kJm[sup 3].« less
  • The change in the magnetic properties of melt-spun Sm{sub 2+{delta}}Fe{sub 15}Ga{sub 2}C{sub 2} permanent magnets with variation of the Sm content {delta} has been investigated in the range of {minus}0.05{le}{delta}{le}0.20. A drastic increase in the coercive field {mu}{sub 0}H{sub C} from 1.5 to 2.2 T at room temperature has been observed for {delta}{ge}0.1. This can be understood as an influence of the Sm-rich nonmagnetic intergranular phase, occurring due to the Sm excess. Room temperature values of the maximum energy density up to (BH){sub max}=64.2kJ/m{sup 3} ({delta}=0.03) can be obtained. The samples with higher Sm contents exhibit larger values of themore » maximum energy density at elevated temperatures (T{ge}450K). For {delta}=0.13, a value of (BH){sub max}=31.4kJ/m{sup 3} has been observed at 500 K. The microstructural parameters {alpha}{sub K} and N{sub eff} describing the influence of the nonideal microstructure on the coercive field in the framework of the nucleation model were determined from the temperature dependence of the coercive field. {copyright} {ital 1997 American Institute of Physics.}« less
  • After homogenization and subsequent nitrogenation melt-spun Sm[sub 2]Fe[sub 17]N[sub x] shows high values of coercivity up to 2T. The coercivity was further increased to 2.9T by applying the Zn-bonding technique. Densities up to 6.7 g/cm[sup 3] could be achieved by Hot Isostatic Pressing (HIP). After HIP, however, the Zn-bonded samples show a deterioration in the shape of the demagnetization curves, which is due to the formation of [alpha]-Fe as indicated by X-ray diffractometry.
  • Aluminium matrix composites containing 15, 30 and 50 vol.% of pulverized Al{sub 62}Cu{sub 25.5}Fe{sub 12.5} (in at.%) melt spun ribbons have been prepared by a vacuum hot pressing (T = 673 K, P = 600 MPa). The microstructure of the initial ribbon and the composites was investigated using X-ray, scanning and transmission electron microscopy. In the as-spun ribbon the quasicrystalline icosahedral phase (i-phase) coexisted with the cubic copper rich β-Al(Cu, Fe) intermetallic compound. The phase composition of Al-Cu-Fe particles changed after consolidation process and the i-phase transformed partially to the ω-Al{sub 70}Cu{sub 20}Fe{sub 10} phase. Additionally, the Θ-Al{sub 2}Cu phasemore » formed at the α(Al)/Al-Cu-Fe particle interfaces. With an increase in volume fraction of the reinforcement the hardness of the composites increased up to HV = 180 for the highest amount of added particles. The ultimate compression strength of the same sample reached the value of 545 MPa. - Highlights: • Al and 15, 30, 50% of pulverized Al{sub 62}Cu{sub 25.5}Fe{sub 12.5} melt spun ribbon were consolidated. • The initial ribbon consisted of the icosahedral i-phase and copper rich β-Al(Cu, Fe). • The i-phase partially transforms to ω-Al{sub 7}Cu{sub 2}Fe phase in all composites. • Increase of microhardness and compressive strength with content of reinforcement • Ultimate compression strength 545 MPa for 50% of added particles.« less