AMER KARMBEIGI - Department of Materials and Metallurgy Engineering, Iran University of Science & Technology, Narmak, Tehran, Iran
ASCAR SADGZADEH - Institute of Plasma Physics and Nuclear Fusion, Amir Abad, Tehran, Iran
ALDIREZA ZAKERI - Department of Materials and Metallurgy Engineering, Iran University of Science & Technology, Narmak, Tehran, Iran

Cu and Ni elemental powder mixtures containing 25, 50, and 75 at% Cu. were subjected to mechanical alloying (MA) in a planetary ball mill under various milling times. The structural evolution during mechanical alloying was characterized by means of X-ray diffractometry (XRD) and scanning electron microscopy (SEM). Experimental results indicate that nano-structured solid solution with single-phase and homogeneous distribution of Ni and Cu has been prepared through interdiffusion mechanism. Average crystallite size of as-milled powders was decreased with increasing Ni content and increasing milling time, and found to be in the order of 15-40 nm after 30 h of milling for all powder compositions. Moreover, lattice constant and lattice strain of solid solutions were increased during mechanical alloying.

Mechanical Alloying, Nano-Structured, Solid Solution, Ni-Cu Binary Alloys