Glasses have markedly different stability around their glass transition temperature ( T g ), and metallic glasses (MGs) are conventionally regarded as metastable compared to other glasses such as silicate glass or amber. Here, we show an aging experiment on a Ce-based MG around its T g (~0.85 T g ) for more than 17 years. We find that the MG with strong fragility could transform into kinetic and thermodynamic hyperstable state after the long-term room temperature aging and exhibits strong resistance against crystallization. The achieved hyperstable state is closer to the ideal glass state compared with that of other MGs and similar to that of the million-year-aged amber, which is attributed to its strong fragility and strong resistance against nucleation. It is also observed through the asymmetrical approaching experiment that the hyperaged Ce-based MG can reach equilibrium liquid state below T g without crystallization, which supports the idea that nucleation only occurs after the completion of enthalpy relaxation.

中文翻译：

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室温老化的超稳定金属玻璃

玻璃在其玻璃化转变温度附近具有明显不同的稳定性（吨 G)，而金属玻璃 (MG) 与硅酸盐玻璃或琥珀等其他玻璃相比，通常被认为是亚稳定的。在这里，我们展示了一个基于 Ce 的 MG 的老化实验。吨 G(~0.85吨 G) 超过 17 年。我们发现具有强脆性的MG在长期室温老化后可以转变为动力学和热力学超稳态，并表现出很强的抗结晶性。与其他MG相比，达到的超稳态更接近理想的玻璃态，与百万年琥珀相似，这归因于其强脆性和抗成核能力。通过不对称逼近实验还观察到，超老化的Ce基MG可以在以下达到平衡液态吨 G没有结晶，这支持了成核仅在焓松弛完成后发生的观点。