한국주조공학회

Bulk amorphous alloys with reasonable glass forming ability and large plasticity were found in Zr-Cu-Al alloys. Further increase in the GFA and the ductility is expected by appropriately choosing a fourth element. In this study, we select Be as the fourth element and added to the Zr-Cu-Al system to synthesize (Zr57.4Cu38.1Al4.5)100−xBex (x = 0~16) alloys and the glass forming ability and the plasticity were measured. With Be addition, the supercooled liquid region (ΔTx), the plasticity and GFA as high as 134oC, 20.5%, 7 mm, respectively, can be obtained. Herein, we present the effect of Be addition on the variations of various mechanical properties and thermal characteristics of the (Zr57.4Cu38.1Al4.5)100−xBex alloys.

Bulk amorphous alloy, Glass forming ability, Plasticity, Supercooled liquid region, Atomic packing density.