Influence of the mechanical alloying parameters on crystallite size of Ti-Al powders

摘要

Nanocrystalline Ti sub x Al sub 100-x (x=75, 50, 40, 35 at.%) alloys were prepared by mechanical alloying. The influence of milling parameters (the milling equipment, milling time and energy) on the crystallite size of the alloys obtained as well as on the thermal stability of the crystallite size was examined. The powders were characterized by X-ray diffraction, scanning differential calorimetry and transmission electron microscopy. Attention was also paid to the influence of the phase transitions during heating of milled powders upon the crystallite size of the product.