Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Shandong University, Jinan 250061, China.
J Chem Phys. 2010 Jul 7;133(1):014508. doi: 10.1063/1.3457670.
Two of the Earth's most abundant substances, water and silica, exhibit some of the most unusual properties in nature. Among these is an anomalous scaling of liquid dynamics, which appear non-Arrhenius (or "fragile") at high temperatures yet Arrhenius (or "strong") at low temperatures. Here we show that this fragile-to-strong (F-S) transition is not limited to a few liquids such as water and silica, but is possibly a general behavior of metallic glass-forming liquids. We also propose a general model for the viscosity of F-S liquids that captures the scaling of dynamics across both the fragile and strong regimes.
地球上两种最丰富的物质，水和二氧化硅，在自然界中表现出一些最不寻常的性质。其中之一是液体动力学的异常标度，在高温下表现出非阿雷尼乌斯（或“脆弱”）特性，而在低温下表现出阿雷尼乌斯（或“强”）特性。在这里，我们表明这种从脆弱到强（F-S）的转变不仅限于水和二氧化硅等少数几种液体，而是可能是金属玻璃形成液体的一般行为。我们还提出了一个用于 F-S 液体粘度的通用模型，该模型捕获了在脆弱和强两个区域内动力学的标度。
