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2008•International Journal of Modern Physics BRequires access

FABRICATION OF IRON-ALUMINA NANOCOMPOSITE POWDER BY HIGH ENERGY BALL MILLING OF HEMATITE-ALUMINUM POWDER MIXTURE

Mohammad Khodaei, F. Karimzadeh, Mohammad Hossein Enayati

Open publisher page 6 citations

Abstract

In this study, hematite ( Fe2O3) and aluminum ( Al ) powder mixtures were mechanically alloyed in a high-energy shaker ball mill to synthesize the iron-alumina ( Fe - Al2O3) nanocomposite powder. The structural changes and phase developments occurring during mechanochemical process were studied by X-ray diffractometery (XRD) and scanning electron microscopy (SEM). The results showed that mechanochemical reaction of Fe2O3and Al completed after 3 hours of milling time in a nanocrystalline Fe and Al2O3embedded form and further milling produced a Fe - Al2O3nanocomposite powder. Kinetics consideration according to the calculated adiabatic temperature demonstrated the sudden displacement reaction during mechanical alloying that accord well with XRD results. Also, particle size decrease as well as crystallite size with increasing the milling time.

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What this paper is about

In this study, hematite ( Fe2O3) and aluminum ( Al ) powder mixtures were mechanically alloyed in a high-energy shaker ball mill to synthesize the iron-alumina ( Fe - Al2O3) nanocomposite powder. The structural changes and phase developments occurring during mechanochemical process were studied by X-ray diffractometery (XRD) and scanning electron microscopy (SEM). The results showed that mechanochemical reaction of Fe2O3and Al completed after 3 hours of milling time in a nanocrystalline Fe and Al2O3embedded form and further milling produced a Fe - Al2O3nanocomposite powder. Kinetics consideration according to the calculated adiabatic temperature demonstrated the sudden displacement reaction during mechanical alloying that accord well with XRD results. Also, particle size decrease as well as crystallite size with increasing the milling time.

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Available abstract

In this study, hematite ( Fe2O3) and aluminum ( Al ) powder mixtures were mechanically alloyed in a high-energy shaker ball mill to synthesize the iron-alumina ( Fe - Al2O3) nanocomposite powder. The structural changes and phase developments occurring during mechanochemical process were studied by X-ray diffractometery (XRD) and scanning electron microscopy (SEM). The results showed that mechanochemical reaction of Fe2O3and Al completed after 3 hours of milling time in a nanocrystalline Fe and Al2O3embedded form and further milling produced a Fe - Al2O3nanocomposite powder. Kinetics consideration according to the calculated adiabatic temperature demonstrated the sudden displacement reaction during mechanical alloying that accord well with XRD results. Also, particle size decrease as well as crystallite size with increasing the milling time.

Key concepts: Materials science, Ball mill, Hematite, Nanocrystalline material, Nanocomposite, Crystallite, Scanning electron microscope, Iron powder

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FABRICATION OF IRON-ALUMINA NANOCOMPOSITE POWDER BY HIGH ENERGY BALL MILLING OF HEMATITE-ALUMINUM POWDER MIXTURE — Research Paper | ScholarLens