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《Materials Review》 2013-24
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Preparation of Fe/Al Composite Powder by Chemical Liquid Deposition Method

DU Rong;TU Yuanqiang;HU Mulin;BAI Huiping;SONG Yifeng;R&D Center of WISCO;State Key Laboratory of Material Processing and Die & Mold Technology,Department of Materials Science and Engineering,Huazhong University of Science and Technology;  
Core-shell structured Fe/Al composite powders were successfully fabricated by chemical liquid deposition method with iron pentacarbonyl(Fe(CO) 5)as the precursor in a selfdesigned processing system.Property chara-cterizations were performed with X-ray diffraction(XRD),scanning electron microscopy(SEM)and simultaneous thermogravimetry-differential thermal analysis(TG-DTA).Fe/Al composite powders with different mole ratio of Fe to Al were discussed.Results show that Al powders were coated with a fine layer of Fe and the oxidation kinetic is significantly improved over pure Al powders.In addition,compared to pure Al powders,the Fe/Al composite powders have much higher reactivity,exothermal and weight gaining capabilities.Heat can be released in a much faster and more concentrated way which considerably improves the combustion process.Composite powder with n(Fe) ∶n(Al)=0.5∶1has the maximum heat release and weight gain.
【Fund】: 国家高技术研究发展计划(863计划)(2009AA03Z317)
【CateGory Index】: TB383.3
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