Natural aging, which is the spontaneous temporal evolution of meta-stable systems, is a great task in amorphous materials. In this work, La₆₂Al₁₄(Cu_5/6Ag_1/6)₁₄(Ni_1/2Co_1/2)₁₀ BMGs with the same master alloy was prepared 8 years ago and at present. The effect of natural aging on the relaxation behavior and mechanical property of the La-based BMG was studied. Experimental results based on dynamic mechanical analysis and differential scanning calorimetry showed that natural aging for 8 years caused the atomic configuration to relax from a meta-stable state to a relatively more stable state, and the crystallization characteristic was also affected by natural aging. The results of compression testing indicated that the plasticity of the La-based BMG would be reduced, as a result of structural relaxation caused by natural aging.

自然老化是亚稳态系统的自发时间演化，是非晶材料的一项艰巨任务。在这项工作中，La ₆₂ Al ₁₄ (Cu _5/6 Ag _1/6 ) ₁₄ (Ni _1/2 Co _1/2 ) ₁₀8 年前和现在制备了具有相同母合金的 BMG。研究了自然时效对La基BMG的弛豫行为和力学性能的影响。基于动态力学分析和差示扫描量热法的实验结果表明，自然时效8年使原子构型从亚稳态弛豫到相对较稳定的状态，结晶特性也受到自然时效的影响。压缩试验结果表明，由于自然老化引起的结构松弛，La基BMG的塑性会降低。