EAGER: Investigation of Environmental Effects on the Fatigue Degradation Properties in Metallic Nanostructures

EAGER：环境对金属纳米结构疲劳降解性能影响的研究

• 批准号: 0952641
• 负责人: Olivier Pierron
• 金额: --
• 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: 2009
• 资助国家: 美国
• 起止时间: 2009-12-15 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0952641&HistoricalAwards=false
• 关键词: EAGER; Investigation; Environmental; Effects; Fatigue

TECHNICAL SUMMARYThe goal of the proposed research is to gain a fundamental understanding on the fatigue degradation properties of metallic nanostructures in non-inert environments. The specific research objectives of the proposed research are to develop an experimental technique using microelectromechanical system (MEMS) devices to accurately measure the fatigue properties of nanostructures in non-inert environments and to investigate the size and environmental effects on the stress-life fatigue curves and fatigue crack growth rates in metallic nanostructures. The novelty of the approach is to use electrical (resistance) measurements to infer structural changes, such as cracking, without the need for in-situ SEM/TEM capability (testing will instead take place in an environmental chamber).NON-TECHNICAL SUMMARYThis research will address unexplored reliability issues regarding the use of metallic nanostructures in nanoscale devices; such issues may ultimately limit their successful commercialization. A thorough understanding of the degradation properties and their dependence on size and environment is fundamental to ensure proper structural reliability of devices fabricated with emerging nanotechnologies. The educational broad impact of the proposed research lies in the opportunities to promote motivation, learning and academic success of high school students from underrepresented groups in the fields of Science, Technology, Engineering and Mathematics (STEM), and to develop the teaching skills of high school teachers. The PI intends to develop, with high school teachers, a summer enrichment program dedicated to the fracture of engineering materials and targeted for high school students in grades 9 and 10.

技术总结所提出的研究的目标是获得在非惰性环境中的金属纳米结构的疲劳降解性能的基本理解。拟议的研究的具体研究目标是开发一种实验技术，使用微机电系统（MEMS）设备，以准确地测量非惰性环境中的纳米结构的疲劳性能，并调查的尺寸和环境对应力寿命疲劳曲线和疲劳裂纹增长率在金属纳米结构的影响。该方法的新奇在于使用电（电阻）测量来推断结构变化，例如开裂，而不需要原位SEM/TEM能力（测试将在环境室中进行）。非技术总结这项研究将解决有关在纳米级器件中使用金属纳米结构的未探索的可靠性问题;这些问题可能最终限制其成功商业化。降解性能及其对尺寸和环境的依赖性的透彻理解是确保新兴纳米技术制造的器件具有适当结构可靠性的基础。拟议研究的教育广泛影响在于促进科学，技术，工程和数学（STEM）领域代表性不足的群体的高中生的动机，学习和学业成功的机会，并发展高中教师的教学技能。PI打算与高中教师一起开发一个专门针对9年级和10年级高中生的工程材料断裂的暑期强化计划。