Patent ID: 9650295
Date: 2017-05-16
CPC Classifications: C04B,C22C

Claim:
1. A process for preparing a Al/TiC nanocomposite material comprising an aluminum matrix in which nano-sized particles comprising TiC are dispersed, the process comprising: contacting a graphite powder with a titanium aluminide powder of the formula Al performing a mechanosynthesis of the first powder mixture to have a mechanical alloying of the first powder mixture, thereby obtaining a second powder mixture, wherein all or part of particles of the second powder mixture comprise both a titanium aluminide phase and a graphite phase; compressing the second powder mixture to obtain one or more greens; and performing a reactive sintering of the green(s), thereby obtaining the Al/TiC nanocomposite material, wherein the mechanosynthesis is performed in an enclosure of a milling device, the enclosure being provided with a rotor which, during the mechanosynthesis, carries out successive cycles, each cycle having a milling phase and a deagglomeration phase, the rotor rotating, at each cycle, at a first speed during a first duration during the milling phase of the cycle and at a second speed during a second duration during the deagglomeration phase of the cycle, the first speed being at least 200 rpm higher than the second speed and the first duration being at least twice as long as the second duration.