2007•Metal Hotworking TechnologyRequires access
Preparation of Al_2O_3 /Fe Nano-composite Powder by Liquid-coating Method
Delin Yang
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Abstract
The composite powder of Nano-Fe particles coated by Al_2O_3 were prepared by liquid-coating method. The influences of sintering and reducing temperature on the composite powder were studied. XRD, TG/DSC, Zeta potential and SEM were used to analyse the composition, the thermodynamic characteristics and the microstructure of the composite powder. The results show that Fe coated-Al_2O_3 nano-composite powder is obtained on the condition of the sintering at 500℃ for 30min and reducing at 700℃ for 1h in H2. The SEM photographs reveal that the coating Fe particles are in the shape of sphericity,whose diameter is about 30 nm,and the dispersion of the powder is uniform.