Effect of Mo Addition on Nanostructured Ni50Al50 Intermetallic Compound Synthesized by Mechanical Alloying

The mechanical alloying process was used to synthesize the ni50al50−xmox nanocrystalline intermetallic compound using pure ni and al elemental powder. this process was carried out in the presence of various mo contents as a micro-alloying element for various milling times. structural changes of powder particles during mechanical alloying were studied by x-ray diffractometry (xrd) and scanning electron microscopy (sem). results showed that mechanical alloying in various combinations was completed after 48 h of milling time. minimum crystallite size of the as-milled powders (∼10 nm) was achieved after introducing mo and milling for 128 h. also, lattice strain decreased with increasing milling time up to 48 h and again increased after 48 h of milling time. on the other hand, the presence of mo significantly affected variation intensity of the lattice parameter and morphology of the powder particles.