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
AbstractA 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.
|Journal series||Journal of Applied Physics, ISSN 0021-8979|
|Keywords in English||6146+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|
|Publication indicators||: 2006 = 2.316 (2) - 2007=2.38 (5)|
|Citation count*||29 (2015-04-25)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.