Mechanochemical Activation of Solid State Reaction between Mg and TiO₂

Abstract

The mechanochemical reaction of TiO₂ and Mg via mechanical alloying of Mg, TiO₂ and Al has been investigated. Reduction of TiO₂ is evident from substantial formation of MgO. Weakening of Mg and TiO₂ diffraction peaks along with broadening suggests refinement in grain size. Mechanically milled powder shows completion of reaction upon subsequent heat treatment while the reaction of the unmilled powder is still incomplete. Analysis suggests that the milled powder undergoes self-propagation while unmilled powder does not.