Abstract
The study on the preparation of anisotropic powders from hot-extruded Pr-Fe-B-Cu alloys has been carried out. It is shown that the method of equal channel angular pressing allows producing Pr-Fe-B-Cu alloys as fine-grain bulk precursors with high coercivity and the radial orientation of the Pr2Fe14B easy axes. The precursors were pulverized by both mechanical grinding and hydrogen decrepitation. After optimization of the particle size and the heat treatment conditions the anisotropic powders with (BH)max ≥ 160 kJ/m3 were obtained.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Clemente, G.B., Keem, J.E. and Bredley J.P. (1988) The microstructural and compositional influence upon HIREM behaviour in Nd2Fe14B, J. Applied Physics, 64(10), 5299–5301.
Goll, D. and Kronmuller, H. (1998) Nanocristalline PrFeB permanent magnets with enhanced remanence, in L. Schultz and K.-H. Muller (eds.) Proc. 15th Int. Workshop on Rare Earth Magnets and their Applications, WerkstofF-Informationsgesellschaft, Dresden, pp. 189–198.
Nakayama, R. and Takeshita, T. (1993) Nd-Fe-B anisotropic magnet powders produced by HDDR process, J. Alloys and Compounds, 193, 259–261.
Mishima, C., Hamada, M., Mitarai, H. and Honkura T. (2000) Magnetic properties of anisitropic magnet powders produced by the d-HDDR method, in H. Kaneko, M. Homma and M. Okada (eds.) Proc. 16th Int. Workshop on Rare Earth Magnets and their Applications, the Japan Institute of Metals, Sendai, pp. 873–882.
Sugimoto, S., Kioke, N., Book, D., Kagotani, T., Okada, M. Inomata, K. and Homma, M. (2002) An improved HDDR treatment for the production of anisotropic Nd-Fe-B ternary powders, J. Alloys and Compounds, 330–332, 892–896.
Sakai, I., Tsutai, A., Sahashi, M. and Inomata, K. (1990) Coercive force of Co added Nd-Fe-B based powders prepared by crushing sintered magnets, IEEE Transaction on Magnetism, 26(5), 2616–2618.
Rivoirard, S., Noudem, J.G., de Rango, P., Furchart, D. and Seubeyroux, J.L. (2000) Anisotropic and coercive powder for bonded magnets, in H. Kaneko, M Homma and M. Okada (eds.) Proc. 16th Int. Workshop on Rare Earth Magnets and their Applications, the Japan Institute of Metals, Sendai, pp. 347–354.
Panchanathan, V, McMullen, A.T., Croat, J.J., Doser, M, and Ribitch, R.W. (1991) Properties of bonded anisotropic magnets, J. Applied Physics 70(10), 6465–6467.
Doser, M, Panchanathan, V. and Mishra, R.K. (1991) Pulverizing anisotropic rapidly solidified Nd-Fe-B materials for bonded magnets, J. Applied Physics 70(10), 6603–6605.
Shimoda, T., Akioka, K., Kobayashi, O., Yamagami, T., Ohki, T., Miagava, M. and Yuri. T., (1989) Hot-working behaviour of cast Pr-Fe-B magnets, IEEE Transaction on Magnetism, 25 (5), 4099–4104.
Burns, V.S.J., Williams, A.J. and Harris I.R. (2000) Production of anisotropic powders from hot deformed RE-Fe-B-Cu alloys, in H. Kaneko, M Homma and M. Okada (eds.) Proc. 16th Int. Workshop on Rare Earth Magnets and their Applications, the Japan Institute of Metals, Sendai, pp. 355–364.
Stolyarov, V.V., Ermolenko, A.S., Gunderov, D.V., Popov, A.G., Raab, G.L, Puzanova, T.Z., Valiev, R.Z., Gaviko, V.S. and Belozerov, E.V. (2000) Equal-channel angular pressing, microstructure and hysteresis properties of ultrafme-grained Pr20Fe73.5B5Cu1.5 alloy, in V.G. Baryakhtar (eds.) Proceedings on the 8th European Magnetic Materials and Application Conference, Trans Tech Publications Ltd, Sweitzerland, pp. 265–268.
Popov, A.G., Puzanova, T.Z., Ermolenko, A.S., Belozerov, E.V., Gaviko, V.S., Raab, G.I., Gunderov, D.V. and Stolyarov, V.V. (2001) Microstructural and magnetic properties of bulk Pr-Fe-B-Cu permanent magnets prepared by equal-channel angular pressing, The Physics of Metals and Metallography, 91, Supplement 1,278–293.
Semiatin, S.L., Segal, V.M., Goetz, R.L., Goforth, R.E. and Hartwig, T. (1995) Workability of a gamma titanium alumide alloy during equal channel angular extrusion, Scripta Metallurgica et Materialia, 33(4), 535–540.
Popov, A.G., Ermolenko, A.S., Belozerov, E.V., Gaviko, V.S., Puzanova, T.Z., Gabay, A.M. and Kim, A.S. (1998) Hard magnetic properties of bulk and powder of (Pr,R)-Fe-B-Cu (R = Tb, Dy) alloys, in L. Schultz and K.-H. Muller (eds.) Proc. 15th Int. Workshop on Rare Earth Magnets and their Applications, Werkstoff-Informationsgesellschaft, Dresden, pp. 103–110.
Meisner, G.P. and Panchanatan, V. (1993) Hydrogen absorption and disproportionation of Nd-Fe-B ribbons, J. Applied Physics 74(5), 3514–3518.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2003 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Popov, A.G., Puzanova, T.Z., Ermolenko, A.S., Gunderov, D.V., Raab, G.I., Stolyarov, V.V. (2003). Pr-Fe-B-Cu Alloys Processed by Equal Channel Angular Pressing as Materials for Anisotropic Bonded Magnets. In: Hadjipanayis, G.C. (eds) Bonded Magnets. NATO Science Series, vol 118. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-1090-0_10
Download citation
DOI: https://doi.org/10.1007/978-94-007-1090-0_10
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-1535-9
Online ISBN: 978-94-007-1090-0
eBook Packages: Springer Book Archive