Adaptive High-Temperature Lubrication through Nanopore Channels

通过纳米孔通道进行自适应高温润滑

• 批准号: 1031201
• 负责人: Daniel Gall
• 金额: $ 29.6万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1031201&HistoricalAwards=false
• 关键词: Adaptive; Temperature; Lubrication; through; Nanopore

This research effort focuses on a new approach to high-temperature self-lubrication, using wear-resistant nanoporous coatings. The key idea is to control and guide the flow of easily-sheared solid lubricant inclusions through nanopore channels within the hard matrix of a composite coating towards its sliding contact surface. It is envisioned that the lubricant flow can be controlled by (i) the original lubricant agglomerate size, (ii) the channel width, and (iii) a thin barrier-layer that allows diffusion only exactly where wear indicates lubricant depletion. The primary advantage of this approach over isotropic or multilayered adaptive composite coatings is the much smaller amount of wear that is required to initiate the supply of additional lubricant to the surface, resulting in less abrasive wear debris and, in turn, greatly enhanced coating life-time.While specifically exploring silver solid lubricant inclusions within a chromium nitride nanoporous matrix, this new strategy is applicable to a range of coating systems and has the potential to become a true breakthrough technology by providing low friction surfaces in various environments and during multiple temperature cycles ranging from 0 to ~1000°C. Applications include hard wear-resistant lubricious coatings for high-temperature bearings in fuel-efficient jet-engines and gas-turbines, solid-lubrication in cyclic air-vacuum environments for space applications, and oil-free air-foil bearings in gas compressors for fuel cells and hydrogen storage. The research effort will also provide the dissertation experience of one graduate student through completion of the doctoral degree, as well as a mind-broadening experience for several undergraduate students to also be involved in the research laboratories. Finally, a hands-on friction and wear sliding test involving solid lubricant-containing materials will be performed by over 200 mechanical engineering undergraduate students per year in their required junior-level Mechanical Systems Laboratory course, providing them direct exposure to the field of engineered multi-functional adaptive materials.

这项研究工作着重于使用耐磨纳米涂层的新方法进行高温自润滑的方法。关键思想是控制和指导易于剪切的固体润滑剂夹杂物通过复合涂层的硬质基质内的纳米通道的流动，向其滑动接触表面。可以预见的是，润滑剂流可以由（i）原始润滑剂团聚大小，（ii）通道宽度和（iii）薄的屏障层，仅允许在磨损表示润滑剂定义的地方进行扩散。 The primary advantage of this approach over isotropic or multilayered adaptive composite coatings is the much smaller amount of wear that is required to initiate the supply of additional lubricant to the surface, resulting in less abrasive wear debris and, in turn, greatly enhanced coating life-time.While specifically exploring silver solid lubricant inclusions within a chromium nitride nanoporous matrix, this new strategy is applicable to a range of coating系统并有可能通过在各种环境中和多温度周期中提供低摩擦表面来成为真正的突破性技术。应用包括在燃油效率喷气引擎和气盘中进行高温轴承的硬磨损润滑涂层，用于空间应用的环环空气效率环境中的固体润滑以及用于燃料电池和氢气储存的气体压缩机中的无油空气轴承。研究工作还将通过填写博士学位来提供一名研究生的论文经验，以及一些本科生也可以参与研究实验室的精神经验。最后，涉及固体润滑剂材料的手动摩擦和磨损滑动测试将在其所需的初级机械系统实验室课程中每年由200多名机械工程本科生进行，从而直接暴露于工程性多功能适应性材料的领域。