抄録
Ti-5at%Cr, Ti-10at%Cr, Ti-20at%Cr and Ti-40at%Cr powders were synthesized by a mechanical alloying (MA) of elemental Ti and Cr powders using a planetary ball mill in argon gas atmosphere for 360ks. The obtained Ti-10at%Cr powder consisted of β-Ti phase and the MA powders containing more than 20at%Cr were composite materials of β-Ti and Cr, while the obtained Ti-5at%Cr powder consisted of α-Ti phase.
Ti-10at%Cr powders synthesized by MA were consolidated to compacts by the pulsed current sintering at 1073K. The sintered compacts consisted of β-Ti and had 326Hv of vickers hardness.
When Ti-10at%Cr powder was prepared by MA process, the recovery of MA powder was not more than 40% of the starting materials in weight. The addition of lmass%Mg to the starting powders of the MA, improved the powder recovery of MA up to about 80%.
