| NUKLEONIKA 2013, 58(1):159-163
CHARACTERIZATION OF PHASE CONSTITUTION AND MAGNETIC PROPERTIES OF THE HARD MAGNETIC NANOCRYSTALLINE Nd9.5Fe63.65B21.85Nb5Małgorzata Szwaja, Katarzyna Pawlik, Jerzy J. Wysłocki, Piotr Pawlik, Piotr Gębara Częstochowa University of Technology, Institute of Physics, Department of Materials Processing Technology and Applied Physics, 19 Armii Krajowej Ave., 42-200 Częstochowa, Poland In order to investigate the phase constitution of the nanocrystalline Nd9.5Fe63.65B21.85Nb5 alloy ribbons in the as-cast state and after short-time annealing Mössbauer study has been carried out. In as-cast state, ribbon samples were not fully amorphous but revealed soft magnetic properties. X-ray diffraction analysis showed the presence of hard magnetic Nd2Fe14B, metastable Nd2Fe23B3 and paramagnetic NdMsub>1+etaFe4B4 phases in annealed samples. Mössbauer spectroscopy was used to determine the fractions of constituent phases formed during annealing of ribbons. Magnetic measurements were made with a vibrating sample magnetometer (VSM) and have shown that with increasing annealing temperature the remanence polarization Jr and maximum energy product (BH)max values were increasing. Close X |