Synthesis of Hard and Lubricious Carbon-Based Nanolayer and Nanocomposite Coatings

CMS-0625512的研究目标是合成和表征在干燥和潮湿环境中具有高硬度和低摩擦性能的碳基纳米层和纳米复合涂层。首席研究人员和他的同事将通过磁控溅射合成这些涂层，这是一种成熟的涂层沉积技术。有来自初步实验的证据表明，这些目标是可以实现的。例如，在氢化碳膜中掺杂5个原子百分比的硫，在干燥和潮湿的环境中的摩擦系数小于0.01。利用程序升温脱附和石英晶体微天平技术研究水的吸附。通过这种方式，可以理解硫在潮湿条件下维持氢化碳膜低摩擦中的作用。硬质和低摩擦涂层对于提高汽车和飞机机械系统的能效具有重要意义。由于这些涂层表面的惰性，它们也是干式加工工具涂层的有力候选者，从而降低了成本并消除了处理旧润滑剂的需要。除了研究生和本科生参与这项研究外，首席研究员和他的同事还计划建立示范单位，以说明摩擦在影响机械系统效率方面的重要性。这些单位将被用来加强首席调查员在常规班级、当地社区和专业协会的讲座。

ABSTRACT- CMS-0625512The research objective is to synthesize and characterize carbon-based nanolayer and nanocomposite coatings that have high hardness and low-friction performance in dry and humid environments. The principal investigator and his coworkers will synthesize these coatings by magnetron sputtering, a well-established coating deposition technique. There is evidence from preliminary experiments to suggest that these goals may be achievable. For example, doping hydrogenated carbon films with 5 atomic percent sulfur gives coefficients of friction of less than 0.01 in dry and humid environments. The adsorption of water will be explored using temperature-programmed desorption and quartz crystal microbalance techniques. In this way, the role of sulfur in maintaining low friction of hydrogenated carbon films in humid conditions can be understood. Hard and low-friction coatings are important in improving energy efficiency of mechanical systems in cars and planes. Because of the inert nature of these coating surfaces, they are also strong candidates as tool coatings for dry machining, which reduces cost and eliminates the need for disposal of used lubricants. In addition to the involving graduate and undergraduate students in this research, the principal investigator and his coworkers plan to construct demonstration units to illustrate the importance of friction in affecting the efficiency of mechanical systems. These units will be used to augment lectures given by the principal investigator to regular classes, the local community and professional societies.