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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 4    December 1999

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Amorphous and nano-crystalline structures of mechanically-alloyed Al-24.4%Fe(mole fraction) powder mixture
Huang Bin(黄斌); ISHIHARA Keiichi N; SHINGU Hideo P

School of Materials Science and Engineering; Shanghai Jiao Tong University; Shanghai 200030; P. R. China;
Graduate School of Energy Science; Kyoto University; Kyoto 606; Japan

Abstract:Elemental powders of Al-24. 4 % Fe (mole fraction) alloy were mechanically-alloyed using a conventional type ball-milling. Not only Fe particles gradually disperse in Al matrix but also Al and Fe crystal grains are refined to the order of ten nanometers after ball-milling for 180 h. The am0rphization starts at the early stage of ball milling and proceeds gradually. Complete amorphization is confirmed by ball-milling for 720h. The amorphization of the Powders after ball-milled for 180 h can be promoted by heating up to 673 K,which suggests a possibility of producing amorphous material by appropriate ball-milling and subsequent heating.

 

Key words:  crystal and amorphous structure; mechanical alloying; Al-Fe alloy

ISSN 1672-7029
CN 43-1423/U

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