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Study of Nd-Fe-B Alloys with Nonstoichiometric Nd Content in Optimal Magnetic State
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SYSNO ASEP 0339967 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Study of Nd-Fe-B Alloys with Nonstoichiometric Nd Content in Optimal Magnetic State Author(s) Ćosović, V. (CS)
Talijan, N. (CS)
Grujić, A. (CS)
Stajić-Trošić, J. (CS)
Žák, Tomáš (UFM-A) RID
Lee, Z. (US)
Radmilović, V. (US)Number of authors 7 Source Title Science of Sintering - ISSN 0350-820X
Roč. 41, č. 2 (2009), s. 211-220Number of pages 10 s. Language eng - English Country SR - Surinam Keywords Rapid quenched Nd-Fe-B alloys ; Nonstoichiometric Nd content ; Phase composition ; Grain size ; Magnetic properties Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects 1M0512 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000271592200012 DOI 10.2298/SOS0902209C Annotation Characterization of two rapid-quenched Nd-Fe-B alloys with nonstoichiometric Nd content in the optimized magnetic state was carried out using the X-ray diffractometry (XRD), Fe-57 Mossbauer spectroscopic phase analysis (MS), electron microscopy (TEM), high resolution TEM (HREM) and Superconducting Quantum Interference Device (SQUID) magnetometer. The alloy with the reduced Nd content (Nd4.5Fe77B18.5) was found to have the nanocomposite structure of Fe3B/Nd2Fe14B and partly alpha-Fe/Nd2Fe14B, with mean grain size below 30 nm. On the other side, the overstoichiometric Nd14Fe79B7 alloy has almost a monophase structure with the dominant content of the hard magnetic phase Nd2Fe14B (up to 95 wt. %) and a mean crystallite size about 60 nm, as determined by XRD and TEM analysis. The results of magnetic measurements on SQUID magnetometer also suggest the nanocomposite structure of the Nd-low alloy and nanocrystalline decoupled structure of the Nd-rich alloy after the optimal heat treatment. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2010
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