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Research on superlubric carbonic materials

超润滑碳材料的研究

基本信息

批准号：
18340087
负责人：
MIURA Kouji
金额：
$ 6.68万
依托单位：
Aichi University of Education
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18340087/
关键词：
Nanomachine Tribology Micromachine Molecularmachine Surface Interface

项目摘要

It is one of the ultimate goals of tribology researchers to realize an ideal friction-free machinery system with zero energy consumption. Since the proposal of the concept of an ideal frictionless sliding, fundamental studies on ultralow friction mechanism have been carried out to date based on mainly two different mechanisms, incommensurate contact and weak interfacial interaction. However there have been few studies aim of which is for practical use in lubrication engineering. Recently we have shown that a C_<60> monolayer system confined by graphite walls exhibits ultralow dynamic friction. In this project, three main subjects have been planned : (1) Research on fine structures of superlubric carbonic materials(2) Development of frictional force microscopy which can measure a friction force of piconewton. (3)Discovery of novel superlubric system. It was able to intercalate C_<60> molecules into graphite films using chemical and thermal treatments. The C_<60>intercalated graphite films consist of alternating close-packed C_<60> monolayers and graphite layers(graphenes). When the loading increases up to 100nN, friction force map provides clear periodic pattern. Interestingly, this periodicity reflects a C_<60> close-pack structure of him, which indicates that the mobility of C_<60>is frozon by the squeeze of graphite walls and/or by the creation of a chemical bonding between C_<60> molecules. The friction mechanism of these films is expected to relate to exhibit a multistage sliding assisted by their movements. Stationary zero friction occurs at a quite large area of 2.3mmx2.3nm in size, and no friction appears for any sliding direction, which is a tremendously important discovery for the realization of nano-and micromachines and for a new and prominent industry.

实现理想的零能耗无摩擦机械系统是摩擦学研究者的终极目标之一。自理想无摩擦滑动的概念提出以来，对超低摩擦机制的基础研究主要基于两种不同的机制，即无公度接触和弱界面相互作用。然而，在润滑工程中以实际应用为目的的研究却很少。最近，我们证明了<60>由石墨壁限制的C_单层系统具有超低的动摩擦。本项目主要研究三个课题：（1）超润滑碳材料的微细结构研究（2）可测量微微牛顿摩擦力的摩擦力显微镜的开发。（3）新型超润滑体系的发现。采用<60>化学和热处理的方法可以将碳分子插入石墨薄膜中。碳<60>插层石墨膜由碳<60>单层和石墨层（石墨烯）交替密排组成。当载荷增加到100 nN时，摩擦力图提供了清晰的周期性图案。有趣的是，这种周期性反映了C_的<60>密堆积结构，这表明C_的流动性<60>是通过石墨壁的挤压和/或通过C_分子之间的化学键的产生<60>而形成的。这些薄膜的摩擦机制预计将涉及到展示一个多级滑动由他们的运动辅助。在2.3mm × 2.3nm的大面积上出现零摩擦，且在任意滑动方向上均无摩擦，这对于实现纳米和微机械以及新兴产业都是一个非常重要的发现。