Articles
  • Fabrication of Fe-TiO2Nanocomposite Powders by Mechanical Alloyin 
  • C.H. Lee*, S.H. Lee, S.J. Lee, J.S. Kima and Y.S. Kwona
  • Department of Advanced Materials Science and Engineering, Mokpo National University, 16 Dorim-ri, Chungkye-myun, Muangun, Chonnam 534-729, Korea a Research Center for Machine Parts and Materials Processing, University of Ulsan, Ulsan 680-749, Korea
Abstract
The effects of mechanical alloying on the solid state reaction of hematite, Fe2O3 and titanium have been investigated at room temperature. We found that the displacement reaction between a Fe2O3 and a more reactive Ti metal can be induced by mechanical alloying. Fe-TiO2 nano-composites in which TiO2 particles were dispersed in an Fe matrix with nano grain size were obtained by mechanical alloying the mixture of Fe2O3-Ti elemental powders for 30 hrs. The average grain sizes of iron in the Fe-TiO2 nano-composite could be reduced to the 20 nm range as estimated by X-ray diffraction line-width measurements. We also show magnetic evidence for the solid state reduction by mechanical alloying through changes in saturation magnetization and coercivity.

Keywords: nano-composite, mechanical alloying, saturation magnetization

This Article

  • 2003; 4(3): 122-125

    Published on Sep 30, 2003

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