Abstract
The main goal of present paper was to study of phase composition of nanocrystalline (Nd10Fe67B23)95Nb5 ribbons prepared by melt-spinning technique with different velocity of the copper wheel. Samples in the as-cast state obtained using speed 5 and 10 m/s had nanocrystalline structure. In case of samples prepared by with speed of copper Wheel 15 and 35 m/s were fully amorphous. In the DSC curve, the two minima corresponding to crystallization of the Nd2Fe23B3 and Nd2Fe14B phases were detected. The coexistence of three phases: Nd2Fe14B, Nd2Fe23B3 and Nd1+εFe4B4 were detected. Higher temperatures of annealing caused crystallization of α-Fe phase. The XRD results were confirmed by the Mössbauer studies. Keywords: hard magnetic materials, phase structure, Mössabuer spectroscopy
Highlights
The main goal of present paper was to study of phase composition of nanocrystalline (Nd10Fe67B23)95Nb5 ribbons prepared by melt-spinning technique with different velocity of the copper wheel
The Mössbauer studies of the Nd9,5Fe63,65B21,85Nb5 alloy ribbon revealed that material is not fully amorphous The analysis showed the presence of the hard magnetic Nd2Fe14B [20-22]
The analysis of the XRD patterns revealed that heat treatment causes changed in the structure of crystalline ribbon
Summary
The main goal of present paper was to study of phase composition of nanocrystalline (Nd10Fe67B23)95Nb5 ribbons prepared by melt-spinning technique with different velocity of the copper wheel. The X-ray diffraction studies were carried out for all prepared samples of the (Nd10Fe67B23)95Nb5 alloy in as cast state. The analysis of X-ray pattern (Fig. 1) revealed that in samples with thickness 60, 35, 25 and 20 μm, some reflexes with low intensity are observed, which allowed us to conclude that in samples some crystalline phases present.
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