金属玻璃结构及其失稳的原子层次研究

管鹏飞, 孙胜君

Atomic-Level Study in the Structure and Its Instability of Metallic Glasses

GUAN Pengfei, SUN Shengjun

图7 非晶形成液体结构弛豫行为与非Gaussian参量之间存在的普适关系：不同过冷液体模型体系，及金属玻璃形成液体^[65,66]
(a)

α_{2, ? m a x}

vs reduced structural relaxation time

τ ? / ? τ^{*}

, here

τ^{*}

is the characteristic time scale under the iso-

α_{2, ? m a x}

condition (

α_{2, ? m a x}

≈ 1.67 here)
(b)

α_{2, ? m a x}

vs reduced structural relaxation time

τ_{α} ? / ? τ^{*}

, here

τ^{*}

is defined from α_{2, max}(τ_α) ≈ 0.8

Fig.7 The universal link between the reduced structural relaxation time and the maximum of non-Gaussian parameter ( $α_{2, ? m a x}$ )for various glass-forming liquids ( $τ^{*}$ is the characteristic time scale under constant dynamic heterogeneity condition)^[65,66]