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An overstoichiometric Nd–Fe–B hard magnetic material
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SYSNO ASEP 0353549 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název An overstoichiometric Nd–Fe–B hard magnetic material Tvůrce(i) Žák, Tomáš (UFM-A) RID
Talijan, N. (CS)
Ćosović, V. (CS)
Stajić-Trošić, J. (CS)
Grujić, A. (CS)Celkový počet autorů 5 Zdroj.dok. Journal of the Serbian Chemical Society - ISSN 0352-5139
Roč. 75, č. 9 (2010), s. 1271-1277Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. SR - Surinam Klíč. slova rapid quenched Nd–Fe–B ; overstoichiometric Nd content ; Mössbauer phase analysis ; XRD ; magnetic properties Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEP 1M0512 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000283207200011 DOI 10.2298/JSC100217058Z Anotace A commercial Nd-rich Nd–Fe–B-based hard magnetic material was studied. The thermomagnetic curve showed clearly besides Curie points of the Nd2Fe14B phase and α-Fe also another critical temperature. Mössbauer (MS) phase analysis and X-ray diffraction analysis (XRD) showed in addition to the commonly known phases Nd2Fe14B and NdFe4B4 also some paramagnetic and ferromagnetic iron atoms (MS) and Fe17Nd2 intermetallics (XRD). During the exerted thermal treatment, the content of the Nd2Fe14B and NdFe4B4 phases remained almost unchanged, while iron atoms from remnant minor phases built a separate α-Fe phase. The XRD pattern also showed the presence of some minor Nd phase. The results of Squid measurements suggest a nanocrystalline decoupled structure of the Nd-rich alloy in the optimized magnetic state. Measurement of the magnetization loop showed, in spite of small changes in the phase composition, that magnetic properties of the quality material deteriorated during the thermal treatment. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2011
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