한국주조공학회

Ni-base amorphous alloys were manufactured using melt-spinning and Cu-mold die casting methods. Amorphous formability, the supercooled liquid region before crystallization and mechanical properties were examined. The reduced glass transition temperature and the supercooled liquid region of Ni5,Nb2oZr9Ti9Co3Cu3 alloy were 0.621 and 46 K respectively. Ni5,Nb2oZr9Ti9Co8Cu3 alloy was produced in the rod shape 3mm diameter using the Cu-mold die casting. Hardness, compression strength, elongation and elastic modulus of the alloy were 850 DPN, 2.75 GPa, 1.8% and 150 GPa respectively. Moreover, compression strength of 2.75 GPa was the highest value in the amorphous bulk alloy produced up to now.

Ni-based Amorphous alloy, Rapid Solidification, Glass Transition, Wide Supercooled Liquid Region, Amorphous Bulk Alloy