Dynamic mechanical relaxation behavior of (La_0.7Ce_0.3)₆₅Al₁₀Co₂₅ bulk metallic glass was studied by using dynamic mechanical analysis (DMA). The experimental results demonstrated that (La_0.7Ce_0.3)₆₅Al₁₀Co₂₅ bulk metallic glass displays a pronounced slow β relaxation. Influence of the physical aging and heat treatment on the internal friction of the metallic glass were also analyzed. Physical aging below the glass transition temperature Tg and in-situ heat treatment introduce a decrease of the atomic mobility of metallic glasses, which is closely associated with the annihilation of defects (structural heterogeneity) of the metallic glasses.

利用动态力学分析（DMA）研究了（La _0.7 Ce _0.3）₆₅ Al ₁₀ Co ₂₅块状金属玻璃的动态力学弛豫行为。实验结果表明，（La _0.7 Ce _0.3）₆₅ Al ₁₀ Co ₂₅块状金属玻璃表现出明显的缓慢β弛豫。还分析了物理老化和热处理对金属玻璃内摩擦的影响。低于玻璃化转变温度Tg并在原位进行物理老化 热处理导致金属玻璃原子迁移率的降低，这与金属玻璃缺陷（结构异质性）的an灭密切相关。