Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 536, Issue -, Pages S348-S353Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.12.003
Keywords
Permanent magnets; Rapid solidification; Mossbauer spectroscopy; X-ray diffraction; Magnetization reversal; Transmission electron microscopy
Categories
Funding
- Polish Ministry of Science and Higher Education
- Polish National Science Centre [N N507 240840]
- [N N507 372735]
- [NR15002206]
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The microstructure and interactions between grains in Pr9Fe52Co13Zr1Nb4B21 magnets produced by short time annealing (at 983 K for 5 min) of rapidly solidified samples were investigated. The specimens were produced in the form of suction-cast 1 mm diameter rods, 1 mm thick plates and 3 mm outer diameter (o.d.) tubes. The X-ray diffraction analysis and Mossbauer spectroscopy shown presence of hard magnetic Pr2Fe11.2Co2.8B and paramagnetic Pr1+xFe4B4 crystalline phases diluted within the amorphous matrix in all samples. The microstructure was studied using TEM microscopy. Furthermore, rates of irreversible magnetization changes upon the change of external magnetic field H, were studied. In order to characterize interactions between grains of crystalline phases the delta M curves were also constructed from recoil data. (c) 2011 Elsevier B.V. All rights reserved.
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