Effect of Tungsten Addition on Phase Constitution and Magnetic Properties of the Bulk Fe65Pr9B26-xWx Alloys
K. Filipecka, P. Pawlik, K. Pawlik, P. Gębara, A. Przybył and M. Pruba
Institute of Physics, Faculty of Production Engineering and Materials Technology, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland
Received: February 2, 2015
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The effect of tungsten addition on phase constitution and magnetic properties of the bulk Fe65Pr9B26-xWx (where x=2, 4, 6, 8) alloys was studied. The base alloys were prepared by arc-melting of the high purity elements under Ar atmosphere. Samples were produced by suction of an arc-molten alloy to a water-cooled copper mould (the suction-casting method). In order to develop nanocrystalline structure, the samples were subjected to annealing. Heat treatment resulted in an evolution of the phase constitution that caused changes in magnetic properties of the alloys. X-ray diffractometry was used to determine the phase composition of annealed samples. The analysis showed presence of hard magnetic Pr2Fe14B, paramagnetic Pr1+xFe4B4 and soft ferromagnetic α -Fe phases of annealed samples. The room temperature magnetic properties were determined from hysteresis loops measured by VSM magnetometer in the external magnetic field up to 2 T. The highest hard magnetic parameters were measured for the rod sample of Fe65Pr9B20W6 annealed at 1003 K for 5 min.

DOI: 10.12693/APhysPolA.128.104
PACS numbers: 75.50.Ww, 75.50.Kj, 71.20.Eh