ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Nanocomposite Nd2Fe14B/Fe3B magnetic materials with high performance have been obtained bycrystallizing over-quenched ribbons. The effect of addition element of Cu and Zr on the phasecomponent, microstructure and magnetic properties of Nd4.5Fe（76.5-x）B18.5Cu0.5Zrx (x= 0.4, 0.5, 1.5, 2.0,3.0, 4.0) has been systematically investigated. The average grain size of Nd2Fe14B phase and Fe3Bphase for the different compositions were calculated from X-day diffraction pattern, which are inaccordance with TEM micrographs. For the Nd4.5Fe77B18.5 ribbons, the average grain size of Nd2Fe14Band Fe3B were 34.2 nm and 51.7 nm, and for the Nd4.5Fe76.3B18.5Cu0.5Zr0.4 ribbons, they were only 36.5nm and 37.1 nm, respectively. It has been found that the additions of Cu and Zr cause the reduction ofthe difference of grain size between the hard magnetic phase and the soft magnetic phase, that increasethe exchange coupling between them. Therefore, it would lead to the magnetic properties improvement.It has been determined that Nd4.5Fe76.3B18.5Cu0.5Zr0.4 was the optimal composition, and the optimalmagnetic properties were: Br= 1.204 T, Hci= 271 kA/m, and (BH)max =111.2 kJ/m3
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.1277.pdf
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