High-Energy X-ray Diffraction Study of Liquid Structure of Metallic Glass-Forming Zr_(70)Cu_(30) Alloy

摘要

High-energy X-ray diffraction experiments were performed for a metallic glass-forming Zr_(70)Cu_(30) alloy in the liquid state at a high temperature. Conical nozzle levitation was applied as a containerless method of obtaining accurate structure information of a highly reactive melt. The total structure factor obtained for the liquid alloy above its melting point shows a particular shoulder on the second peak, which is probably an indication of local icosahedral short-range ordering typically observed in deeply undercooled liquids. This implies that short-range ordered clusters already exist even in the equilibrium liquid state of Zr-based metallic glass-forming alloys.