Abstract

The efects of mechanical aloying conditions and the type of reducing agent on the solid state reductionof haematite Fe_2O_3 have been investigated at room temperature. Aluminium titanium zinc and copper were used as reducing agent. Nanocomposites of metal-oxide in which oxide particles with nano size were dispersed in Fe matrix were obtained by mechanical alloying of Fe_2O_3 with aluminium and titanium respectively However the reduction of Fe_2O_3 by coppe was not occurred Composite materials of iron with Al_2O_3 and TiO_2 were obtained from the system of Fe_2O_3-Al and Fe_2O_3-Ti after ball milling for 20 hrs and 30 hrs respectively. And the system of Fe_2O_3-Zn resulted in the formationof FeO with ZnO after ball milling of 120 hrs. The final grain sizes of iron estimated by X-ray diffraction line-width measurement were in the ranges of 24~33 nm.

• Keywords: Mechanical alloying;Solid state reduction;Composite material;Nano grain size;Haematite;