碳纳米管中金属熔体的结构演化及其凝固特性

项目名称： 碳纳米管中金属熔体的结构演化及其凝固特性

项目编号： No.51271100

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 李辉

作者单位： 山东大学

项目金额： 80万元

中文摘要： 用高温熔体物性测量仪、场发射电镜及高分辨电镜结合计算机模拟，研究Sn、Ga两类金属熔体在碳纳米管中的结构及性质，探究碳纳米管内金属熔体凝固行为、凝固组织与宏观块体金属的异同点；揭示碳纳米管空腔的"尺寸效应"和"限域效应"对金属熔体凝固特征的影响。研究凝固过程中金属熔体在纳米空间中的结构演化规律。尝试寻找金属原子向碳纳米管内填充的新方法和新工艺，获取碳纳米管的表面润湿性与充填效果的对应关系，并制备金属填充的碳纳米管复合结构，为纳米铸造技术提供实验参数和理论指导。本项研究中，理论模拟与实验研究相互验证，可增强研究结果的可靠性。研究结果将有助于揭示碳纳米管中金属熔体凝固过程的微观物理图像，对于利用纳米铸造技术开发和制备新结构材料具有重要价值。

中文关键词： 熔体结构；液液相变；润湿；团簇结构；受限空间

英文摘要： Using physical properties measurement instruments for high-temperature melt, field emission electron microscopes, high resolution electron microscopes in combination with computational simulations, the structures and properties of molten Sn and Ga confined in carbon nanotubes are studied, and the similarities and differences between molten metal in carbon nanotube and bulk metal on solidification behaviors and structures are investigated. In addition, the influence of "size effect" and "confinement effect" of carbon nanotube on the solidification characteristics of molten metal is revealed. Through studying the structural evolution principles of molten metal during solidification in carbon nanotube, we attempt to find new methods of encapsulation into nanotubes with metal atoms and relationships between surface wetting and encapsulation effects of nanotubes. Furthermore, we fabricate metal-filled carbon nanotube composite structures and provide experimental parameters and theoretical guidelines for nano-casting. In this study, the self-consistent verification between theoretical simulations and experimental research significantly improves the reliability of research results. The research results can not only provide an atomic level insight into the physical essence of solidification of molten metal in carbon nan

英文关键词： structure of melt；liquid liquid phase transition；wettability；cluster structure；confined space