Small Grant for Exploratory Research (SGER) on Development of Nanoparticle Visualization Techniques for Tribological Applications

关于开发摩擦学应用纳米颗粒可视化技术的探索性研究小额资助 (SGER)

• 批准号: 9977314
• 负责人: Minami Yoda
• 金额: $ 4.99万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9977314&HistoricalAwards=false
• 关键词: Small; Grant; Exploratory; Research; SGER

9977314YodaUnder an SGER award experimental techniques will be developed for visualizing the mechanical and chemical interactions of nano-scale particles with solid surfaces in the soft elastohydrodynamic tribological regime. The approach uses particles dyed with fluorescent indicators to directly visualize particle mechanics and chemistry. A variant of this technique, "particle proximity sensing," will visualize only particles which are within 0.1-1 mm of the surface-i.e., the particles which actually interact with the surface. These techniques will be used to study three-body interactions once appropriate methods for "marking" sub-micron indicator particles have been developed. The visualizations will be used to investigate how particles suspended in a fluid at the interface between a smooth, rigid surface and a rough, elastomeric surface are transported into the interface and interact with both surfaces. The study will help resolve issues such as how surface adhesion forces and Brownian motion affect three-body interaction, what the time scales of third body interaction are, and what fraction of the abrasive particles actually interact with both surfaces.The techniques and experiments developed during this research will contribute to a fundamental understanding of three-body interactions. This understanding will impact a wide range of applications ranging from solid contaminants in fluid films to particle additives used in lubricants and surface treatments. Physically based models of the dynamics of the particles which wear solid surfaces will be of particular importance for understanding degradation of seals and bearings and for optimizing processes such as polishing.***

9977314Yoda 根据 SGER 奖，将开发实验技术，用于可视化软弹流体动力学摩擦学状态下纳米级颗粒与固体表面的机械和化学相互作用。 该方法使用用荧光指示剂染色的颗粒来直接可视化颗粒力学和化学。 该技术的一个变体“粒子接近传感”将仅可视化距离表面 0.1-1 毫米范围内的粒子，即实际与表面相互作用的粒子。 一旦开发出“标记”亚微米指示颗粒的适当方法，这些技术将用于研究三体相互作用。 可视化将用于研究悬浮在光滑刚性表面和粗糙弹性表面之间界面处的流体中的颗粒如何被输送到界面中并与两个表面相互作用。 这项研究将有助于解决诸如表面粘附力和布朗运动如何影响三体相互作用、第三体相互作用的时间尺度以及磨料颗粒实际与两个表面相互作用的比例等问题。本研究期间开发的技术和实验将有助于对三体相互作用的基本理解。 这种理解将影响广泛的应用，从流体膜中的固体污染物到润滑剂和表面处理中使用的颗粒添加剂。 磨损固体表面的颗粒动力学的基于物理的模型对于了解密封件和轴承的退化以及优化抛光等工艺特别重要。***