Mechanical alloying of Fe-B alloys |
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Authors: | H Okumura K N Ishihara P H Shingu H S Park S Nasu |
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Affiliation: | (1) Department of Metal Science and Technology, Kyoto University, Yoshida Sakyo-ku, 606 Kyoto, Japan;(2) Department of Metallurgical Engineering, Seoul National University, San 56-1 Shillim-2 dong Kwanak-gu, 151 Seoul, Korea;(3) Department of Metal Physics, Faculty of Engineering Science, Osaka University, Toyonaka, 560 Osaka, Japan |
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Abstract: | Mechanical alloying (MA) of Fe-B alloy systems using a conventional ball mill has been performed. The structure change of Fe100?x B x for the composition range 10≤x≤90 has been investigated using X-ray diffractometry, thermal analysis, transmission electron microscopy, scanning electron microscopy and Mössbauer spectroscopy. According to the X-ray diffraction analysis, the sequences of transformation have been classified into three groups,x≤20, 25≤x≤35 andx≥50 for Fe100?x B x . The amorphous phase whose composition is nearlyx=30, first appeared for the whole composition range. This amorphous phase changed into a tetragonal Fe2B-like compound on further milling for 1000 h. On further milling of thex= 50 sample, the Fe2B compound phase disappeared and orthorhombic FeB compound appeared. |
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