The synthesis of nanocrystalline Ni_(75)Nb_(12)B_(13) alloys by high energy ball milling of elemental components

摘要

Ni_(75)Nb_(12)B_(13) alloys were synthesized by mechanical alloying (MA) of individual Ni, Nb and B components. X-ray investigation showed the formation of Ni (Nb, B) solid solution and amorphous phase at the intermediate stage of milling. Metastable phases formed by MA turned into Ni (Nb), Ni_(21) Nb_2B_6 and Ni_3Nb stable phases during heating up to 720 ℃. The exothermal effects on DSC curves were caused with these processes. The disintegration of Ni (Nb, B) solid solution and crystallization of an amorphous phase resulted in the stable phases formation during the milling prolongation as well as after thermal treatment.