Abstract
The structural development with milling time during mechanical alloying (MA) of Ni and Ti powders with the composition of Ni75Ti25 was investigated by SEM, x-ray diffraction and DSC. The MA powders were sintered by hot press. The phase, microstructure and hardness of the sintered compacts were studied using x-ray diffraction, SEM, TEM, and vickers hardness tester. Ni solid solution with an amorphous phase was formed in the final alloying stage, which was identified by x-ray diffraction and DSC measurements. The appropriate MA time to obtain a well-sintered compact with respect to the chemical homogeniety, relative density and hardness was found to be longer than 360ks.
