KOLCHUGINA Natalia VSB-Technical University of Ostrava

Spoluautoři LUKIN Aleksandr, BURKHANOV Gennadii, KURSA Miroslav, SKOTNICOVA Katerina, DRULIS Henrik

X-ray diffraction analysis, scanning electron microscopy, and Auger electron spectroscopy were used to study structural peculiarities of sintered (Nd,Pr,Dy,Tb)-Fe-B magnets prepared with TbH2 additions. The marked increase in the coercive force observed along with a slight decrease in the residual inductance, which were reached in using TbH2 hydride additions in the powder mixture, are discussed in terms of the formation of nano-heterogeneous distribution of Tb within 2-14-1 phase grains. The existence of such a Tb distribution is shown to determine the magnetic hardening of the principal phase. This study was performed in the frame of the project No. Cz.1.05/2.1.00/010040 “Regional Materials Science and Technology Center” and the Branch of Chemistry and Materials Science, RAS (Program no. 5).