Nanotechnology with Emphasis on Tribology: A Combined Experimental and Simulation Study

以摩擦学为重点的纳米技术：实验与模拟相结合的研究

• 批准号: 9871919
• 负责人: Peter Cummings
• 金额: $ 58万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-15 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9871919&HistoricalAwards=false
• 关键词: Nanotechnology; Emphasis; Tribology; Combined; Experimental

Abstract CTS-9871919 Cummings This is a grant to undertake a fundamental study of lubrication at manometer scale, including experiments with surface rheometry and non-equilibrium molecular dynamics simulation. The project will be a multi-disciplinary, multi-institutional collaboration. The first goal of the research is to achieve overlap in shear rate between experiments and simulations with the same systems. This overlap, sought for over a decade, will be achieved through significant advances in the capabilities of both the experimental and numerical approaches. A second goal is to extend both the experimental and computational efforts to more complicated systems and surface characteristics, including surfaces with chemical and topographical heterogeneity, that are of primary technological importance. A third goal is to study not only the steady-state shear response of nano-tribology systems but also their transient behavior, including the technologically important issues related to adhesion. A final, but overarching, goal of the work is to seek new methods to reduce the friction and wear of moving surfaces separated by only nanometers. These goals will be attained through coordinated experiments and calculations that probe the fundamental phenomena involved at a molecular level. The motivation for this work is that devices with moving parts separated by only nanometers are already of immense technological and economic importance, magnetic recording devices such as computer disk drives, for example. Many other novel micro-electro-mechanical systems (MEMS), such as micro-motors, are under development. The fluid between the moving surfaces in such devices is subjected to extremely high rates of shear strain, 108 s-1 or higher, more than an order of magnitude higher than previously attained in any controlled experiment. Often, lubrication is essential to the practical use of such devices, and the US data storage industry has identified the development of new lubricants and surf ace finish as one of six major technical objectives to achieving increased recording density and read/write speed. This project results from a proposal submitted in response to NSF 98-20 Partnership in Nanotechnology: Synthesis, Processing and Utilization of Functional Nanostructures (FNS).

摘要 CTS-9871919 Cummings 这是一项拨款，用于进行压力计尺度润滑的基础研究，包括表面流变测量和非平衡分子动力学模拟实验。 该项目将是一个多学科、多机构合作的项目。该研究的第一个目标是实现同一系统的实验和模拟之间剪切率的重叠。这种十多年来寻求的重叠将通过实验和数值方法能力的重大进步来实现。 第二个目标是将实验和计算工作扩展到更复杂的系统和表面特征，包括具有化学和地形异质性的表面，这具有首要的技术重要性。 第三个目标是不仅研究纳米摩擦学系统的稳态剪切响应，而且研究它们的瞬态行为，包括与粘附相关的技术上的重要问题。 这项工作的最终但总体目标是寻求新方法来减少仅以纳米间隔的移动表面的摩擦和磨损。 这些目标将通过协调实验和计算来实现，这些实验和计算探讨了分子水平上涉及的基本现象。 这项工作的动机是，运动部件间隔仅纳米的设备已经具有巨大的技术和经济重要性，例如计算机磁盘驱动器等磁记录设备。 许多其他新型微机电系统（MEMS），例如微电机，正在开发中。 此类装置中移动表面之间的流体承受极高的剪切应变率（108 s-1 或更高），比之前在任何受控实验中获得的结果高出一个数量级以上。 通常，润滑对于此类设备的实际使用至关重要，美国数据存储行业已将开发新型润滑剂和表面处理确定为实现更高记录密度和读/写速度的六大技术目标之一。 该项目源自针对 NSF 98-20 纳米技术合作伙伴关系提交的提案：功能纳米结构 (FNS) 的合成、加工和利用。