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Magnetic properties of Nd-Fe-Co-Al rapid solidification alloys

  • Nguyen Huy Dan und Luu Tien Hung
Veröffentlicht/Copyright: 22. August 2013
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 104 Heft 5

Abstract

Nd-Fe–Al–Co alloys with thickness of 0.05–4 mm were prepared by means of rapid solidification methods, suction-casting and melt-spinning, and investigated using X-ray diffraction, electron microscopy and magnetization measurements. With appropriate composition and quenching rate, the alloys behave as single-phase hard magnetic materials. Coercivity of the alloys can reach 7.6 kOe at room temperature and exceed 30 kOe at 100 K. When the thickness of the alloys is increased, multi-magnetic phase behavior is clearly performed and Nd2Fe15Al, NdAl2, Nd3Al and Nd phases are further crystallized. The optimal hard magnetic properties of the alloys closely related to a microstructure which consists of nanocrystallites with size of 10–30 nm dispersed in an amorphous matrix. The hard magnetic phase in the alloys belongs to the amorphous phase. The nanocrystallites, whose total volume fraction is very small in comparison with that of the amorphous phase, probably act as pinning centers, resulting in high coercivity behavior of the alloys.

Keywords: Rare-earth transition metal alloys; Bulk-amorphous materials; Hard-magnetic materials; Coercivity mechanism
* Correspondence address, Assoc. Prof. Dr. Nguyen Huy Dan, Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Str. Caugiay, Hanoi, Vietnam, Tel.: +84-4-37567155, Fax: +84-4-37282064, E-mail:

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Received: 2011-10-6
Accepted: 2012-8-30
Published Online: 2013-08-22
Published in Print: 2013-05-10

© 2013, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Original Contributions
  4. Martensite transformation of sub-micron retained austenite in ultra-fine grained manganese transformation-induced plasticity steel
  5. Isothermal transformation of β-phase in Cu-rich Cu-Al-Sn alloys
  6. The effect of nitrogen on the coarsening rate of precipitate phases in iron-based alloys with chromium and vanadium: experimental and theoretical investigations
  7. Phase diagram investigation of the Sn-InxAgyCuz (x:y:z = 7:2:1) section in the Ag-In-Sn-Cu system
  8. Grain refinement and mechanical properties of low-carbon steel by means of equal channel angular pressing and annealing
  9. Thermophysical properties of solid phase palladium over a wide temperature range
  10. Magnetic properties of Nd-Fe-Co-Al rapid solidification alloys
  11. Synthesis of Ir1-xRex (0.15 ≤ x ≤ 0.40) solid solutions under high-pressure and high-temperature
  12. Preparation and magnetic characterization of Fe/metal oxide nanocomposite particles by means of hydrogen reduction assisted ultrasonic spray pyrolysis (USP-HR)
  13. Biofilm formation and corrosion resistance of Ni/SiC nanocomposite layers
  14. Characterization of electrospun fibrous scaffold produced from Indian eri silk fibroin
  15. Hydrothermal synthesis of nano nickel phosphides and investigation of their thermal stability
  16. Effects of PVP and CTAB surfactants on the morphology of cerium oxide nanoparticles synthesized via co-precipitation method
  17. DGM News
  18. DGM News
https://doi.org/10.3139/146.110891
Schlagwörter für diesen Artikel
Rare-earth transition metal alloys; Bulk-amorphous materials; Hard-magnetic materials; Coercivity mechanism

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Original Contributions
  4. Martensite transformation of sub-micron retained austenite in ultra-fine grained manganese transformation-induced plasticity steel
  5. Isothermal transformation of β-phase in Cu-rich Cu-Al-Sn alloys
  6. The effect of nitrogen on the coarsening rate of precipitate phases in iron-based alloys with chromium and vanadium: experimental and theoretical investigations
  7. Phase diagram investigation of the Sn-InxAgyCuz (x:y:z = 7:2:1) section in the Ag-In-Sn-Cu system
  8. Grain refinement and mechanical properties of low-carbon steel by means of equal channel angular pressing and annealing
  9. Thermophysical properties of solid phase palladium over a wide temperature range
  10. Magnetic properties of Nd-Fe-Co-Al rapid solidification alloys
  11. Synthesis of Ir1-xRex (0.15 ≤ x ≤ 0.40) solid solutions under high-pressure and high-temperature
  12. Preparation and magnetic characterization of Fe/metal oxide nanocomposite particles by means of hydrogen reduction assisted ultrasonic spray pyrolysis (USP-HR)
  13. Biofilm formation and corrosion resistance of Ni/SiC nanocomposite layers
  14. Characterization of electrospun fibrous scaffold produced from Indian eri silk fibroin
  15. Hydrothermal synthesis of nano nickel phosphides and investigation of their thermal stability
  16. Effects of PVP and CTAB surfactants on the morphology of cerium oxide nanoparticles synthesized via co-precipitation method
  17. DGM News
  18. DGM News
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