GOALI: Understanding Tribological Properties of Thermally-Synthesized Carbon

目标：了解热合成碳的摩擦学特性

• 批准号: 2315343
• 负责人: Seong Kim
• 金额: $ 45.07万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-02-01 至 2027-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2315343&HistoricalAwards=false
• 关键词: GOALI; Understanding; Tribological; Properties; Thermally

This Grant Opportunity for Academic Liaison with Industry (GOALI) award will support fundamental tribochemistry research that will elucidate the friction and wear behaviors of carbon materials. Carbon blocks and coatings are widely used to control friction and wear of sliding interfaces in manufacturing processes or manufactured goods. This project focuses on understanding and improving tribochemical properties of thermally-synthesized carbon (TSC) materials for the application where low friction is beneficial. Polycrystalline graphite powders and other TSC materials show relatively high friction, although superlubricity is readily observed on the basal plane of graphite and for hydrogenated diamond-like carbon produced via plasma enhanced deposition process. This raises an important question – what controls superlubricous behaviors of different types of carbon materials? Addressing this question can lead to a better design of carbon materials that can be used as carbon brushes for electrical motors or generators and/or mechanical seals in which oil or grease lubrication cannot be employed. Reduction of friction and wear of these components will greatly improve energy efficiency in manufacturing processes. These issues are important in new energy applications and hence US competitiveness. Morgan Advanced Materials is participating as the GOALI partner and will provide commercial and custom-designed carbon materials for the study. The project will provide research opportunities to undergraduate students in the Penn State Commonwealth system. The surface analysis results of this project will be integrated with graduate-level education. Two hypotheses will be studied: (i) Friction of carbon materials depends on the distribution of sp2 and sp3 hybridizations and how they are connected to form the amorphous network, which varies with synthesis method. (ii) The chemical activity of reactive sites exposed at the sliding interface also varies depending on how carbon materials are synthesized. Studying these hypotheses requires the analysis of shear-induced structural transforms and chemical reactions occurring at the frictional interface; but that interface is not readily accessible for in-situ characterization. Alternately, relevant information can be deduced from the ex-situ analysis of the transfer film on the counter-surface formed from different carbon materials. This is because friction is a non-equilibrium process, and the final state of the transfer film will be a function of the initial state and the condition during friction. Various spectroscopic techniques will be employed to analyze the transfer film to identify tribochemical parameters governing friction and wear behaviors of thermally-synthesized carbon materials.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项与行业联络的赠款机会（Goali）奖将支持基本的贸易化学研究，以阐明碳材料的摩擦和磨损行为。碳块和涂料广泛用于控制制造工艺或制造商品中滑动界面的摩擦和磨损。该项目的重点是理解和改善热合成碳（TSC）材料的贸易化学性质，而低摩擦是有益的。多晶石墨粉和其他TSC材料显示出相对较高的摩擦，尽管在石墨的基本平面和通过血浆增强沉积过程产生的氢化钻石样碳中很容易观察到超润滑性。这就提出了一个重要的问题 - 是什么控制了不同类型的碳材料的级别行为？解决这个问题可能会导致更好的碳材料设计，该碳材料可用作电动机或发电机和/或机械密封件的碳刷，在该碳中无法使用油或油脂润滑。这些组件的摩擦和磨损的减少将大大提高制造过程中的能源效率。这些问题在新的能源应用中很重要，因此在美国的竞争力中很重要。 Morgan Advanced Materials作为目标合作伙伴参与，并将为研究提供商业和定制设计的碳材料。该项目将为宾夕法尼亚州联邦系统的本科生提供研究机会。该项目的表面分析结果将与研究生水平的教育集成。将研究两个假设：（i）碳材料的摩擦取决于SP2和SP3杂交的分布以及它们如何连接以形成无定形网络，而无定形网络随综合方法而变化。 （ii）在滑动界面暴露的反应性位点的化学活性也因碳材料的合成方式而异。研究这些假设需要分析剪切诱导的结构变换和在摩擦界面上发生的化学反应。但是，对于原位表征，该界面不容易访问。或者，可以从不同碳材料形成的反表面上的转移膜的前静脉分析中推论相关信息。这是因为摩擦是一个非平衡过程，并且转移膜的最终状态将是初始状态和摩擦过程中条件的函数。将采用各种光谱技术来分析转移膜，以识别控制摩擦和热合成的碳材料的磨损行为的跨化膜。该奖项反映了NSF的法定任务，并被认为是通过使用基金会的知识和更广泛影响的评估来审查Criteria来通过评估来通过评估来获得支持的。