Mie Potential and Equation of State of Zr₄₈Nb₈Cu₁₄Ni₁₂Be₁₈ Bulk Metallic Glass

The linear expansion of Zr₄₈Nb₈Cu₁₄Ni₁₂Be₁₈ bulk metallic glass (BMG) with excellent glass forming ability and high thermal stability is investigated by a dilatometry method. The average expansion coefficient is α_TG= 1.04 x 10^-5 K^-1 (300-656 K) for the BMG and α_TG= 1.11 x 10^-5 K^-1 (356～890 K) for the crystallized alloy. The Mie potential as well as the equation of state of the BMG and its corresponding crystallized state are determined from the thermal expansion and ultrasonic data, and the differences among them are phenomenologically explained.