Microstructure and Properties of Magnets Obtained by Hydrostatic Extrusion of Nd-Fe-B Powder

• Authors: T. Gizynski , W. Kaszuwara , P. Pawlik , M. Kulczyk , M. Leonowicz , B. Michalski
• Languages of publication: EN

Abstracts

EN

Nd-Fe-B MQ powder was initially densified in a copper capsule to reach about 60% of the theoretical density. Subsequently, three various processes of hydrostatic extrusion were conducted at room temperature. The values of true strain, obtained during the all three stages, were 1.38, 0.89, 0.94, respectively. The investigation performed showed that the coercivity of the material decreases as the strain increases. Decrease of the remanence was observed only for the highest strains. Size of the particles was strongly reduced during the extrusion processes. X-ray diffraction did not show changes in the phase structure of the material. The Mössbauer study, of the sample extruded within all the three stages, showed existence of the Nd₂Fe₁₄B phase and 16% of other phase. Analysis of magnetization versus temperature confirmed that the additional phase was ferromagnetic.

Keywords

EN

75.50.Ww

Discipline

• 75.50.Ww: Permanent magnets(for magnets, see 07.55.Db in instruments)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 626-628

Dates

published

2015-02

Contributors

author

T. Gizynski

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Wołoska 141, 02-507 Warsaw, Poland

author

W. Kaszuwara

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Wołoska 141, 02-507 Warsaw, Poland

author

P. Pawlik

• Częstochowa University of Technology, Institute of Physics, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

M. Kulczyk

• Institute of High Pressure Physics, Polish Academy of Sciences, Sokołowska 29/37, 01-142 Warsaw, Poland

author

M. Leonowicz

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Wołoska 141, 02-507 Warsaw, Poland

author

B. Michalski

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Wołoska 141, 02-507 Warsaw, Poland

References

• [1] W. Pachla, M. Kulczyk, A. Świderska-Środa, M. Lewandowska, H. Garbacz, A. Mazur, K.J. Kurzydłowski, in: Proc. 9th Int. Conf. on Mat. Forming ESAFORM-2006, Glasgow (UK), Eds.: N. Juster, A. Rosochowski, Publishing House Akapit, Krakow, Poland 2006, p. 535
• [2] W. Pachla, A. Morawski, P. Kovac, I. Husek, A. Mazur, T. Lada, R. Diduszko, T. Melisek, V. Strbık, M. Kulczyk, Supercond. Sci. Technol. 19, 1 (2006), doi: 10.1088/0953-2048/19/1/001
• [3] W. Kaszuwara, M. Kulczyk, M. Leonowicz, T. Gizynski, B. Michalski, IEEE Trans. Magn. 50, 1 (2014), doi: 10.1109/TMAG.2014.2317152
• [4] D. Oleszak, A. Olszyna, Composites R4 11, 284 (2004)

Identifiers

DOI

10.12693/APhysPolA.127.626