论文标题
朝着永久稳定的眼镜
Towards glasses with permanent stability
论文作者
论文摘要
与晶体不同，随着时间的流逝，玻璃杯年龄或devitripripripriprim缩小的性质。在许多工业应用中，这种缺乏稳定性是一个严重的问题。在这里，我们通过数值模拟表明，通过抑制体积分数不均匀性，可以防止准硬透明眼镜的脱粒化。具有“雪崩”类间歇性动力学已知的单分散玻璃对粒度大小进行了小的迭代调整，以使局部体积分数在空间上均匀。我们发现，这完全阻止了衰老时间尺度上的结构放松和去脱位，即使在存在微晶的情况下也是如此。每个粒子的载荷最近邻居的数量有一个巨大的均匀化，表明可以通过“机械均匀化”形成超稳定的玻璃。我们的发现为玻璃稳定提供了物理原理，并为机械稳定玻璃的形成开辟了新的途径。
Unlike crystals, glasses age or devitrify over time, reflecting their non-equilibrium nature. This lack of stability is a serious issue in many industrial applications. Here, we show by numerical simulations that the devitrification of quasi-hard-sphere glasses is prevented by suppressing volume fraction inhomogeneities. A monodisperse glass known to devitrify with `avalanche'-like intermittent dynamics is subjected to small iterative adjustments to particle sizes to make the local volume fractions spatially uniform. We find that this entirely prevents structural relaxation and devitrification over aging time scales, even in the presence of crystallites. There is a dramatic homogenization in the number of load-bearing nearest neighbors each particle has, indicating that ultra-stable glasses may be formed via `mechanical homogenization'. Our finding provides a physical principle for glass stabilization and opens a novel route to the formation of mechanically stabilized glasses.
