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2015 | 127 | 2 | 626-628
Article title

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

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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
Year
Volume
127
Issue
2
Pages
626-628
Physical description
Dates
published
2015-02
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)
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv127n2153kz
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