论文标题

玻璃形成液体的非阿拉尼乌斯行为和脆弱的过渡

Non-Arrhenius behavior and fragile-to-strong transition of glass-forming liquids

论文作者

Junior, Antonio Cesar do Prado Rosa, Cruz, Clebson, Santana, Wanisson Silva, Junior, Elias Brito Alves, Moret, Marcelo Albano

论文摘要

玻璃形成液体的非阿里尼乌斯行为的表征是研究了解非晶体材料的形成机理的广泛途径。在这种情况下,本文考虑了超级Arrhenius扩散过程,探讨了玻璃形成系统粘度的主要特性。我们建立粘性激活能量是温度的函数,测量系统的脆弱程度,并通过标准安格尔的图表征脆弱到肌的过渡。我们的结果表明,在脆弱液体中观察到的非阿里尼乌斯行为可以通过表征这些系统的扩散过程的非马克维亚动力学来理解。此外,脆弱的到紧身过渡对应于玻璃过渡过程中时空相关性的变化。

Characterization of the non-Arrhenius behavior of glass-forming liquids is a broad avenue for research toward the understanding of the formation mechanisms of noncrystalline materials. In this context, this paper explores the main properties of the viscosity of glass-forming systems, considering super-Arrhenius diffusive processes. We establish the viscous activation energy as a function of the temperature, measure the degree of fragility of the system, and characterize the fragile-to-strong transition through the standard Angell's plot. Our results show that the non-Arrhenius behavior observed in fragile liquids can be understood through the non-Markovian dynamics that characterize the diffusive processes of these systems. Moreover, the fragile-to-strong transition corresponds to a change in the spatio-temporal range of correlations during the glass transition process.

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