Nanoscale Characterization of Nanostructured Thin Film with Ultrahigh Strength and Ductility

具有超高强度和延展性的纳米结构薄膜的纳米级表征

• 批准号: 0928517
• 负责人: Scott Mao
• 金额: $ 30万
• 依托单位: University of Pittsburgh
• 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: 2009-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0928517&HistoricalAwards=false
• 关键词: Nanoscale; Characterization; Nanostructured; Thin; Film

New outstanding chemical, mechanical and physical properties are potentially exhibited in nanostructured materials. The nanostructured thin film with extremely high strength/ductility as well as fracture toughness can be very attractive for MEMS components and thin film coatings. Although mechanical behavior of bulk nanostructured materials has been investigated, there is lack of understanding on source of strength?Cductility and fracture as well as their fundamental relationships in nanostructured thin films. In order to design and process better thin film with ultrahigh strength, ductility and fracture resistance, novel nanostructured thin film processing and understanding on the source of strength and ductility in the films are important. Therefore, the research project is aimed at (1) developing a new fabrication technique to achieve better mechanical behavior (high strength and toughness) in nanostructured thin films for MEMS and coating application, and (2) understanding strengthening mechanism and fracture process in the thin films so as to identify a ?gproper?h microstructure for best mechanical performance. The nanoscale characterization on the nanostructured thin film is expected to contribute to the advancement in nanostructured thin film and nanocharacterization. The project will integrate research and education by (i) providing training for graduate and undergraduate students, (ii) course development on nanostructured thin films, (iii) increased participation of underrepresented groups into the research through current Minority Engineering Mentoring Program in University of Pittsburgh, and (iv) outreach to elementary school and exposure of young students to nanoscale science & technology through Internet explorers and Pittsburgh Carnegie Science Museum.

纳米结构材料具有潜在的优异的化学、机械和物理性能。具有极高的强度/延展性以及断裂韧性的纳米结构薄膜对于MEMS部件和薄膜涂层可能非常有吸引力。虽然块体纳米结构材料的力学行为已被研究，有缺乏了解的力量来源？纳米结构薄膜的韧性和断裂及其基本关系。为了设计和加工具有更好的抗弯强度、延展性和抗断裂性的薄膜，新型纳米结构薄膜的加工以及对薄膜中强度和延展性来源的理解是重要的。因此，该研究项目的目的是（1）开发一种新的制造技术，以实现更好的机械性能（高强度和韧性）的纳米结构薄膜的MEMS和涂层应用，和（2）了解强化机制和断裂过程中的薄膜，以确定一个？gproper？h微观结构，以获得最佳的机械性能。纳米结构薄膜的纳米尺度表征有望为纳米结构薄膜和纳米表征的发展做出贡献。该项目将通过以下方式整合研究和教育：（i）为研究生和本科生提供培训;（ii）纳米结构薄膜课程开发;（iii）通过匹兹堡大学目前的少数民族工程指导计划，增加代表性不足的群体参与研究;（iv）通过互联网探索者和匹兹堡卡内基科学博物馆，向小学推广并使年轻学生接触纳米科学技术。