Thermomagnetic Behaviour and Microstructure of a Rapidly Quenched Nd4.5Fe77B18.5 Alloy |
| N. Talijan, V. Ćosović, A. Grujić, J. Stajić-Trošić
Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia and T. Žák Institute of Physics of Materials, Academy of Sciences of the Czech Rep., v.v.i.,Žižkova 22, 616 62 Brno, Czech Republic |
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| Received: 9 07 2007; |
| Changes in the phase composition and crystallite size, as well as changes in the magnetic behaviour of Nd4.5Fe77B18.5 alloy, caused by thermomagnetic measurements, was observed in regard of the optimal magnetic state of this alloy. In the optimized magnetic state, the formed nanocomposite consisted of Fe3B/Nd2Fe14B and partly of α-Fe with a mean crystallite size < 30 nm, as determined by X-ray diffraction and transmission electron microscopy. An increased amount of α-Fe, the presence of Nd2O3 and different Fe-B phases, as well as an increase in the mean crystallite size were observed after thermomagnetic measurements had caused a quality loss of the hard magnetic properties. |
| DOI: 10.12693/APhysPolA.113.525 PACS numbers: 81.40.Rs |