Synthesis of nanocrystalline intermetallic compounds in Ni-Ti-Al system by mechanothermal method

A nanostructured Ni-Ti-Al system was produced through mechanothermal process. In this paper, the structural and morphological evaluation of mechanically alloyed powders has been highlighted. The result exhibited that, the aluminum dissolved into NiTi structure after mechanical alloying and the low crystalline NiTi(1 1 0) phase was obtained. The milled powders transformed into nanocrystalline NiTiAl and Ni3(Ti,Al) phases after annealing at 1150 °C for 15 min. According to XRD patterns, SEM micrographs and TEM results, the mechanothermal process can be used for preparation of nanostructured Ni-Ti-Al system which, otherwise, cannot be made through conventional methods with appropriate structural and morphological features.