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http://yadda.icm.edu.pl:443/baztech/element/bwmeta1.element.baztech-article-BUJ6-0011-0054

Czasopismo

Nukleonika

Tytuł artykułu

Phase structure of the nanocrystalline Nd2Fe14B/alfa-Fe magnets with different grain

Autorzy Wnuk, I.  Wysłocki, J.  Przybył, A. 
Treść / Zawartość
Warianty tytułu
Konferencja Proceedings of the All-Polish Seminar on Mössbauer Spectroscopy OSSM'06, June 18-21, 2006, Koszęcin, Poland
Języki publikacji EN
Abstrakty
EN The effect of the contents of the magnetically hard and magnetically soft phases on the magnetic properties of Nd2Fe14B + alfa-Fe nanocrystalline magnets, as produced by the method of mechanical alloying, has been established. The phase composition of specimens was determined using X-ray diffractometry and Mössbauer spectroscopy. The Mössbauer examination showed that as the powder milling times increased, the content of the Nd2Fe14B phase increased from 42.8% (after the milling time of 10 h, with a grain size of 44.8 nm) to 66.3% (after the milling time of 48 h, with a grain size of 37.3 nm) and then decreased to 40.3% after 120 h of milling. On the other hand, the content of the magnetically soft phase alfa-Fe initially decreased (from 27.7%), reaching a minimum after the milling time of 48 h (17.4%) and then increasing to 36.9% after 120 h of milling.
Słowa kluczowe
EN Nd2Fe14B + alfa-Fe nanocrystalline magnets   Mössbauer spectroscopy   magnetic properties  
Wydawca Institute of Nuclear Chemistry and Technology
Czasopismo Nukleonika
Rocznik 2007
Tom Vol. 52, supl. 1
Strony 85--88
Opis fizyczny Bibliogr. 10 poz., rys.
Twórcy
autor Wnuk, I.
autor Wysłocki, J.
autor Przybył, A.
  • Institute of Physics, Department of Materials Processing Technology and Applied Physics, Częstochowa University of Technology, 19 Armii Krajowej Str., 42-200 Częstochowa, Poland, Tel./Fax: +48 34 3250795, wyslocki@mim.pcz.czest.pl
Bibliografia
1. Fidler J, Schrefl T (1998) Micromagnetic calculation of the limits of composite Nd2Fe14B/α-Fe, Fe3B, Fe23B6 magnets. In: Proc on 10th Int Symp on Magnetic Anisotropy and Coercivity in Rare Earth-Transition Metal Alloys, Dresden, Germany: 267−276
2. Givord D, Li HS, Tasset F (1985) Polarized neutron study of the compounds Y2Fe14B and Nd2Fe14B. J Appl Phys 57:4100−4103
3. Herbst JF, Croat JJ (1991) Neodymium-iron-boron permanent magnets. J Magn Magn Mater 101:360−362
4. Herbst JF, Croat JJ, Yelon WB (1985) Structural and magnetic properties of Nd2Fe14B. J Appl Phys 57:4086−4090
5. Kaszuwara W (2003) Role of chemical composition and processing method in the tailoring of properties of nanocrystalline RE-M magnets. Oficyna Wydawnicza Politechniki Warszawskiej, Warszawa (in Polish)
6. Leonowicz M (1996) Modern hard magnetic materials.Oficyna Wydawnicza Politechniki Warszawskiej, Warszawa (in Polish)
7. O’Handley RC (2000) Modern magnetic materials. Principles and applications. John Wiley & Sons, New York
8. Rosenberg M, Deppe P, Wójcik M (1985) An NMR and Mössbauer study of Nd2Fe14B. J Appl Phys 57:4124−4126
9. Sagawa M, Hirosawa S, Yamamoto H, Fujimura S, Matsuura Y (1987) Nd-Fe-B permanent magnet materials. Jpn J Appl Phys 26:785−800
10.Schneider G, Henig E, Stadelmayer HH, Petzow G (1986) Horizons of powder metalurgy. In: Proc Int Powder Met Conf and Exhibition: “The future of powder metallurgy”, Düsseldorf, Germany: 1197
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