Abstract
Nickel and molybdenum form a variety of compounds with silicon. These silicides posess many interesting properties, such as low density, good oxidation resistance and good electronic property. Their narrow compositional range and high melting points, nevertheless, make the processing by conventional methods difficult. In this study, the formation of silicides was attempted by the mechanical alloying (MA) method. The MA behavior of Ni-Si and Mo-Si systems was examined at atomic ratios corresponding to stoichiometric compositions of respective silicides. It was observed that silicides equivalent to the ratios of mixed element powders, were produced in the MA process. In the MA behavior of Mo33Si67, αMOSi2 of the low temperature phase and βMoSi2 of the high temperature phase were formed; further, in more MA, they resulted in amorphization.
