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3 因制备条件(冷却速率和压力)不同导致的模拟金属玻璃结构与动态响应不均匀性差异。左图为压强和冷却速率不同的样品的约化损耗模量随约化温度( $T ? / ? T_{α}$ )的演化曲线^[54]，右图表示相同样品约化损耗模量随体系平均五次对称性变化的情况

Fig.3 The cooling rate and pressure dependence of the structure and dynamics response heterogeneity of metallic glasses. Reduced loss modulus (E″) as a function of scaled temperature ( $T ? / ? T_{α}$ ) (a)^[54] and the fraction of full icosahedra ( $f_{i c o}$ ) (b) (T—temperature, T_α—the temperature at which the E″ curve exhibits a peak corresponding to the α-relaxation, which signals the transition from glassy to supercooled liquid states; S1-S3, P1, and P3 denoted samples with different thermal histories)