Structurization and Properties of Magnetoplastics Made of Mechanically Activated Amorphous-Crystalline Powder Alloys Based on the Nd-Fe-B System

Article Preview

Abstract:

The influence of the method of melt spinning on the basis of the Fe-Nd-B system on the amorphous-crystal structure of ribbons and flakes is shown. It is established that the magnetic properties of magnetoplasts depend on the powders particle size, the parameters of mechanic activation during flake milling, the kinetics of formation and growth of Fe2Nd14B phase nuclei at all stages of their preparation and processing, etc. Isotropic and anisotropic magnetoplasts and sintered magnets with magnetic properties: Br = 0.5-1.25 T, HcB = 180-700 kA/m; (BH)max = 50-280 kJ/m3.

You might also be interested in these eBooks

Info:

Periodical:

Solid State Phenomena (Volume 284)

Pages:

455-459

Citation:

Online since:

October 2018

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2018 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

[1] P.P. Pashkov, D.D. Pokrovsky, Diagram of the Fe-Nd-B system state and the structural features of its alloys, High-energy permanent magnets and their application in electromechanics: VNIIEM Works, 85 (2003) 93-120.

Google Scholar

[2] M. Sagawa, S. Fyjimura, New material for permanent magnets on a base of Nd and Fe. J. Appl. Phys., 55(6) (1984) 2083-(2087).

Google Scholar

[3] J.J. Croat, J.F. Herbst, Pr-Fe and Nd-Fe based materials. Anew sass high performance permanent magnets. J. Appl. Phys., 55(6) (1984) 2078-(2082).

DOI: 10.1063/1.333571

Google Scholar

[4] D.G.R. Jones, N. Martinez, D. Pere, X-Ray Diffraction and Magnetic Studies of HDDR Processed Nd-Fe- ( Co, Ga )- B Permanent Magnet Alloys. X111 -Jnt. Workshop on Rare – Earth Magnets and their Applications. 11-14 (1994) 413-424.

Google Scholar

[5] N.V. Mushnikov, V.B. Demin, A.S. Zetkin, Magnetic properties and microstructure of Nd-Fe-B powders produced by processing alloys in hydrogen, Physics of Metals and Metallography, 77(6) (1994) 53-59.

Google Scholar

[6] T. Takeshita, R. Nakayama, Magnetic properties and mikrostruktures of the Nd-Fe-B magnet powders produced by HDDR process., 12 Jnt. Workshop on RE Magnets and their Applications, Canberra, July, (1992) 670-681.

Google Scholar

[7] M. Dahlgren, P. Grossingler, Analysis of Magnetic Anisotropy and the Temperature Dependence of Magnetic Properties for Nanocrystalline Melt Spun R-Fe-B (R=Nd, Pr) Ribbons., Rare-Earth Magnets and their Applications. Dresden, 1 (1998) 253-262.

Google Scholar

[8] C.R. Paik, M. Okada, M. Homm, Anisotropic Pr-Fe-B melt-spun ribbons, IEEE Trans. On Magn., 26 (1990) 1730-1732.

DOI: 10.1109/20.104507

Google Scholar

[9] S. Hirozawa, H. Kanekiyo, Magnetic Properties and Microstructure of As-Spun Fe3B/Nd2Fe4B Nanocomposite Permanent Magnets Produced by Low-Speed Spinning Technique, Rare-Earth Magnets and their Applications. Dresden, 1 (1998) 215-224.

Google Scholar

[10] D. Givord, H.S. Li, J.M. Morean, Magnetic properties and crystal structure of Nd2 Fe14B, Solid state Commun. 50(6) (1984) 497-499.

Google Scholar

[11] Yu.V. Yagodkin, A.S. Lileev, V.P. Menushenkov, Yu.A. Skakov, Structure of alloys for permanent magnets based on rare-earth metal compounds, Metal Science and Thermal Treatment of Metals. 8 (2000) 20-24.

DOI: 10.1007/bf02471307

Google Scholar

[12] P. Schrey, TEM Studies of Sintered Fe-Nd-B Magnets. IEEE Transactions on Magnetics. 22(5) (1986).

DOI: 10.1109/tmag.1986.1064431

Google Scholar

[13] S. Prakash Narayan, B. Kunal, V. Jayaram, Studies on the Deformation Behavior of Nano-Crystalline Nd-Fe-B Magnets, 15 Int Workshop on Rare-Earth Magnets and their Applications. Dresden, 1 (1998) 349-358.

Google Scholar

[14] Qi. Zeng, Y.F. Xiao, X.B. Lin, Exitence, Structure and Magnets Properties of Mechanically Alloyed Nd-Fe-Mo-Ti Compounds and their Nitrides, Rare-Earth Magnets and their Applications. Dresden, 1 (1998) 323-329.

Google Scholar