Effect of grain size and tungsten addition on microstructure and magnetic properties of Nd-Fe-B type magnets

• Autorzy: Przybył A. , Wnuk I. , Gębara P. , Wysłocki J. J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The paper presents the results of the microstructural and magnetic examinations of Nd-Fe-B type magnets produced by the mechanical powder milling method and doped with tungsten. Design/methodology/approach: The effect of the grain size and addition of tungsten on the microstructure and magnetic properties of nanocrystalline alloys of the basic composition of Nd₁₀Fe₈₄B₆, as produced by the method of mechanical alloying in the process of prolonged milling, was investigated in the study. Powders were subjected to milling for a duration ranging from 10 to 120 hours in an Ar protective atmosphere. Moreover tungsten was added to the base alloy that exhibited the best magnetic parameters. The tungsten content of alloys varied in a broad range from 0 to 33 at%. Findings: The examinations have shown that the grinding duration, for which the best magnetic properties are obtained, is 90 hours. Prolonged grinding has a significant effect on the grain size and microstructure refinement. The alloy addition in the form of tungsten, similarly as in the case of prolonged grinding, leads to a structure refinement. In the case of W addition, an increase in the coercive field, with a simultaneous decrease in the value of remanence and magnetic energy density (BH)max, is observed. Practical implications: Development of relatively cheap Nd₁₀Fe₈₄B₆ magnets of good service properties. Originality/value: Determination of the effect of grain size and tungsten content on the magnetic properties and microstructure of the Nd-Fe-B magnets.

Słowa kluczowe

EN

magnetic properties; Nd-Fe-B magnets; microstructure

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2011
• Tom: Vol. 49, nr 2
• Strony: 210--214
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Przybył A.

• Institute of Physics, Faculty of Materials Processing Technology and Applied Physics, Częstochowa University of Technology

autor

Wnuk I.

• Institute of Physics, Faculty of Materials Processing Technology and Applied Physics, Częstochowa University of Technology

autor

Gębara P.

• Institute of Physics, Faculty of Materials Processing Technology and Applied Physics, Częstochowa University of Technology

autor

Wysłocki J. J.

• Institute of Physics, Faculty of Materials Processing Technology and Applied Physics, Częstochowa University of Technology

Bibliografia

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