Collaborative Research: Understanding Mechanical and Thermal Properties and Their Coupling at Nanomolecularly Modified Metal-Ceramic Interfaces

合作研究：了解纳米分子改性金属陶瓷界面的机械和热性能及其耦合

• 批准号: 1100933
• 负责人: Ganpati Ramanath
• 金额: $ 26.14万
• 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: 2011
• 资助国家: 美国
• 起止时间: 2011-05-01 至 2015-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1100933&HistoricalAwards=false
• 关键词: Collaborative; Research; Understanding; Mechanical; Thermal

This project aims to investigate and develop models to describe the effects of molecular chemistry, chemical environment, interface topography, and thermo-mechanical cycling on interfacial fracture toughness and thermal conductance at model metal-ceramic interfaces modified with molecular nanolayers. Tailoring adherent metal-ceramic interfaces using near-zero-thickness nanolayers is an attractive method to preserve the functionality, stability and reliability of materials systems for many emergent applications, e.g., nanoelectronics, device packaging and wiring, and biological implants. The effects of nanolayer chemistry on interfacial toughness will be studied in model metal/ceramic interfaces subject to different loading conditions to obtain insights into the nanoscale mechanics of interfacial fracture. The results of these studies will be applied to investigate and exploit the coupling between molecular bonding and interfacial heat transport. The resultant understanding of the interface-chemistry-physics-mechanical-thermal property relationships is anticipated to enable new ways for rational molecular-level tailoring of interfacial properties for tailoring a wide variety of materials systems. This research will provide a molecular-level understanding for tailoring the stability and thermomechanical properties of soft-hard hetero-interfaces, and paves way for rational design of a wide variety of composite materials and archictectures for engineering applications. On the educational front, this project will serve as a platform for cross-disciplinary training of graduate and undergraduate students from a PhD-granting research university (RPI) and an undergraduate-only college (E&H), respectively, through collaboration on a problem of key importance at the cusp of materials science, chemistry and mechanical engineering. The complementary execution of two research thrusts through summer visits and periodic meetings will enrich the research and educational experience of graduate and undergraduate students in both groups. The research will be integrated into extant courses at both institutions. Site-visits and a summer internship for a high-school teacher are planned to K-12 students to the latest developments in the field of nanomaterials interfaces and their importance in emerging engineering applications.

本项目旨在研究和开发描述分子化学、化学环境、界面形貌和热机械循环对分子纳米层修饰的金属-陶瓷界面的界面断裂韧性和热导的影响的模型。利用接近零厚度的纳米层来定制附着的金属-陶瓷界面是一种很有吸引力的方法，可以在许多紧急应用中保持材料系统的功能性、稳定性和可靠性，例如纳米电子、器件封装和布线以及生物植入物。我们将在不同加载条件下的金属/陶瓷模型界面上研究纳米层化学对界面韧性的影响，以深入了解界面断裂的纳米尺度力学。这些研究结果将被应用于研究和开发分子键和界面热传输之间的耦合。由此产生的对interface-chemistry-physics-mechanical-thermal性质关系的理解有望为合理地在分子水平上裁剪界面性质以定制各种材料体系提供新的方法。这一研究将在分子水平上为调整软-硬异质界面的稳定性和热机械性能提供依据，并为工程应用中各种复合材料和结构的合理设计铺平道路。在教育方面，该项目将作为一个平台，通过在材料科学、化学和机械工程的关键问题上的合作，分别为授予博士学位的研究型大学(RPI)和仅限本科生的学院(E&amp；H)的研究生和本科生提供跨学科培训。通过暑期访问和定期会议相辅相成地执行两项研究，将丰富两组研究生和本科生的研究和教育经验。这项研究将被整合到这两个机构现有的课程中。计划进行实地考察和一名高中教师的暑期实习，让K-12年级的学生了解纳米材料界面领域的最新发展及其在新兴工程应用中的重要性。