Effects of Adsorbed Water on TiO Synthesis by Mechanical Alloying

Mixtures of Ti and six kinds of anatase-type TiO2 which differ in adsorbed water content were mechanically alloyed by a planetary ball mill to synthesize TiO. The milled powders were investigated by powder X-ray diffractometry and scanning electron microscopy. The results showed that TiO formation was inhibited by adsorbed water. The effect of adsorbed water on the MA process will be discussed in terms of TiHx formation and local temperature rise. In addition, we also found that polymorphic transformation of TiO2 induced by ball milling was inhibited by adsorbed water.