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Structural and phase composition modification of nanocrystalline Nd14Fe79B7 allloy during thermomagnetic measurements
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SYSNO ASEP 0339981 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Structural and phase composition modification of nanocrystalline Nd14Fe79B7 allloy during thermomagnetic measurements Author(s) Talijan, N. (CS)
Ćosović, V. (CS)
Žák, Tomáš (UFM-A) RID
Grujić, A. (CS)
Stajić-Trošić, J. (CS)Number of authors 5 Source Title Journal of Mining and Metallurgy Section B-Metallurgy - ISSN 1450-5339
Roč. 45, č. 1 (2009), s. 111-119Number of pages 9 s. Language eng - English Country SR - Surinam Keywords Neodymium rich Nd-Fe-B alloy ; Thermomagnetic mesurement ; X-ray diffraction ; 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 000273016600012 DOI 10.2298/JMMB0901111T Annotation Changes in the microstructure phase composition and magnetic properties of rapid quenched Nd-rich Nd14Fe79B7 alloy as caused by thermomagnetic measurement (TM) were studied using XRD methods of phase analysis, crystallite size and lattice microstrain determination. The changes were analysed between the optimized magnetic state and state after TM up to 800 degrees C. Measurement of magnetic properties was on the SQUID magnetometer at ambient temperature. The obtained experimental results show that the investigated alloy in the optimized magnetic state has nearly monophase composition with predominant content of hard magnetic Nd2Fe14B phase (up to 95 mass %) with mean crystallite size below 60 nm. In the state after TM, it was found that the decreased amount of Nd2Fe14B phase (75 mass %), increased amount of soft magnetic phases, predominantly of Fe7Nd5, formation of Nd-rich oxide Nd2O3 phase, as well as grain growth have caused the observed quality loss of hard magnetic properties. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2010
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