2014•Rejiagong gongyiRequires access

Preparation of Nano-crystalline Fe_3Al/α-Al_2O_3 Composite Powders by High-energy Ball Milling

Li Wei Zhou

Abstract

Nano-crystalline Fe3Al/α-Al2O3composite powder was prepared by high-energy ball milling using Fe, Al and Fe2O3powders as raw materials. The powders with different milling time were characterized by X-ray diffraction analysis. The results show that nano-crystalline Fe3Al/α-Al2O3composite powder can be obtained by reaction ball milling the mixture of Fe, Al and Fe2O3powders for 250 min. The composite powders are formed in three steps during high-energy ball milling process as follows:2Al+Fe2O3=Al2O3+2Fe, 6Al+Fe=Al6Fe and Al6Fe+12Fe=Fe3Al.

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Key concepts: Ball mill, Materials science, Nano-, Composite number, Metallurgy, High energy, Raw material, Ball (mathematics)