Application of the shock compaction technique for consolidation of hard magnetic powders

Marcin Leonowicz , Waldemar Kaszuwara , Elżbieta Jezierska , D. Januszewski , G. Mendoza , H. A. Davies , J. Paszula


A shock compaction technique has been successfully applied for the consolidation of hard magnetic powders without appreciable changes in the phase structure and grain size. Pr \#x2013;Fe \#x2013;B and Sm \#x2013;Fe \#x2013;N materials, prepared with the application of melt spinning and mechanical alloying, respectively, were shock compacted with a shock wave speed of 1200 m/s and a pressure of 4.4 GPa. We found that the coercivity of high RE containing material, for which the magnetic hardness is controlled by good magnetic separation of magnetic grains by a RE-rich paramagnetic phase, decreases slightly, by \#x223c;5 \#x2009;\%, due to the closer proximity of the crystallites in a dense material. For low RE, exchange coupled materials, the densification does not change the coercivity. \#xa9; 1998 American Institute of Physics.
Author Marcin Leonowicz ZMKF
Marcin Leonowicz,,
- Division of Construction and Functional Materials
, Waldemar Kaszuwara ZMKF
Waldemar Kaszuwara,,
- Division of Construction and Functional Materials
, Elżbieta Jezierska ZPIM
Elżbieta Jezierska,,
- Division of the Essentials of Materials Engineering
, D. Januszewski
D. Januszewski,,
, G. Mendoza
G. Mendoza,,
, H. A. Davies
H. A. Davies,,
, J. Paszula
J. Paszula,,
Journal seriesJournal of Applied Physics, ISSN 0021-8979
Issue year1998
Keywords in English6146+w, 6250+p, 7550Kj, 7550Tt, 7550Vv, 7550Ww, 8105Bx, 8105Ys, 8120Ev, boron alloys, coercive force, densification, Grain size, iron alloys, magnetic particles, Mechanical alloying, Melt spinning, Nanostructured materials, permanent magnets, praseodymium alloys, samarium alloys, shock wave effects, transmission electron microscopy
Score (nominal)35
Publication indicators WoS Impact Factor: 2006 = 2.316 (2) - 2007=2.38 (5)
Citation count*29 (2015-04-25)
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