ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Microstructure of the anisotropic Nd-Fe-B thick-film magnets has been investigated bytransmission electron microscopy. Specimens of the thick-film magnets were prepared by thehigh-speed pulsed laser deposition method with a substrate heating system. It was revealed that thefilm deposited on a Ta substrate has a three-layer structure of Nd2Fe14B: The lower layer is composedof isotropic grains about 50-300 nm in diameter, the middle one has a columnar structure of 1 3m inheight, and the upper one is again composed of small isotropic grains about several ten nm indiameter. The three-layer-structure is explained to result from a partial recrystallization ofmicro-crystalline Nd2Fe14B that are formed at the moment of deposition. In the middle layer, thec-axis of columnar grains is fairly aligned in the direction perpendicular to the substrate surface. Thepreferred orientation of c-axis produces the magnetic anisotropy of the thick-films
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1131.pdf
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