期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 74, 期 4, 页码 550-557出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2012.12.002
关键词
Nanostructures; X-ray diffraction; Microstructure; Magnetic properties
The mechanical alloying process has been used to prepare nanocrystalline Fe73.5Si13.5B9Nb3Cu1 powders in a high energy planetary ball-mill Retsch PM400/2. Morphological, microstructural, structural, thermal and magnetic characterizations of the powders milled several times were investigated by scanning electron microscopy, X-ray diffraction, differential scanning calorimetry and hysteresis meter. A mixture of Fe(Si)-type nanograins (14 nm), Fe2B boride phase (similar to 12 nm), and bcc substitutional Fe(B)-type solid solution is obtained after 150 h of milling. The coercivity and saturation magnetization values are about 62 Oe and 14 emu/g, respectively. Several magnetic transition temperatures are revealed in the DSC scans of the ball-milled powders in the temperature ranges 500-560 degrees C and 599-606 degrees C, related to the Fe(B) and Fe(Si)-type phases, respectively. (C) 2012 Elsevier Ltd. All rights reserved.
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