虚空连接性和临界性在压缩诱导的短距离有吸引力的合体的凝到玻璃过渡中
Michio Tateno1,2, Yinqiao Wang1, Hajime Tanaka1,3
1The University of Tokyo, Research Center for Advanced Science and Technology, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan.
Physical review letters
|February 14, 2025
概括
这项研究揭示了凝在压缩下如何转化为玻璃,显示了空隙结构和机械应力的明显变化. 这些发现提供了对无序固体和物质性质的洞察.
科学领域:
- 软物质物理学 软物质物理学
- 材料科学是一种材料科学.
- 类风病学 类风病学 类风病学
背景情况:
- 凝和有吸引力的玻璃是软物质中常见的动态停止状态.
- 之前的研究指出,它们的特性有相似之处和差异,但微观结构机制尚不清楚.
研究的目的:
- 研究凝到玻璃过渡的微观结构机制.
- 了解凝崩过程中机械应力和微观结构之间的关系.
主要方法:
- 凝的单轴压缩使用共聚焦显微镜.
- 布朗的动力学模拟来补充实验观测.
主要成果:
- 在空洞结构中确定了两个连续的过渡:穿透空洞到孤立的空洞,然后到无空玻璃.
- 观察到应力缩放的变化,从超线性功率定律转变为与体积分数增加的爆炸性分歧.
- 这些微观结构变化与机械应力行为相关联,特别是在较低的温度下.
结论:
- 该研究阐明了凝崩期间机械自组织的过渡.
- 了解这些关键现象可以增强对无序固体的洞察力.
- 这些发现可以帮助控制多孔材料中的机械性能和运输.
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