NSF-BSF: Architecting metallic nanoparticles for ultimate strength

NSF-BSF：构建金属纳米颗粒以获得终极强度

• 批准号: 1904428
• 负责人: Yuri Mishin
• 金额: $ 36万
• 依托单位: George Mason University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-01 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1904428&HistoricalAwards=false
• 关键词: NSF; BSF; Architecting; metallic; nanoparticles

Non-technical Summary:Material objects with dimensions on the micrometer or nanometer length scales can exhibit much higher strength than macroscopic objects. To realize the exciting new opportunities offered by such objects, it is necessary to understand the laws of plasticity, or material deformation, in defect-free nano-scale systems. Such laws are largely unknown and are likely to be different from those in macroscopic metals. The US and Israeli Principal Investigators will conduct a collaborative research program that tightly integrates experiments and computer modeling to achieve a deeper fundamental understanding of the laws and mechanisms of plasticity in nano-scale metals and alloys. This research will create a theoretical framework for the design of new nano-scale materials combining the highest-possible mechanical strength with other service characteristics. This research will impact many areas of science and technology where mechanical strength is one of the goals of materials design. The Principal Investigators will disseminate the results of this project through presentations at interdisciplinary meetings, publishing overview articles, and by organizing workshops/symposia on broad topics emphasizing nano-scale phenomena across disciplines. This will include a series of US-Israel nano-mechanics workshops with broad international participation. To reach out to broader communities, significant efforts will be put in popularizing this research using online scientific news outlets. The US Investigator and the students will visit local (Fairfax Co.) high schools to give popular presentations including examples of nano-scale phenomena and their impact on modern technology.Technical Summary:The US and Israeli Principal Investigators (PIs) propose a collaborative research program that tightly integrates experiments and computer modeling to achieve a deeper fundamental understanding of the laws and mechanisms of nucleation-controlled plasticity in nano-scale metals and alloys. The research will be focused on Ni and several Ni-based alloys strategically chosen to probe some of the key factors that can impact the particle strength. Such factors will include the particle size and shape, the surface oxidation state, the chemical composition of the alloy, the long-range order, and the phase transformations. This research will create a theoretical framework for the design of new nano-scale materials combining the highest-possible mechanical strength with other service characteristics. The PIs will disseminate the results of this project through presentations at interdisciplinary meetings, publishing overview articles, and by organizing workshops/symposia on broad topics emphasizing nano-scale phenomena across disciplines. This will include a series of US-Israel nano-mechanics workshops with broad international participation. To reach out to broader communities, significant efforts will be put in popularizing this research using online scientific news outlets. The US PI and the students will visit local (Fairfax Co.) high schools to give popular presentations including examples of nano-scale phenomena and their impact on modern technology.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.

非技术摘要：在微米或纳米长度尺度上具有尺寸的材料对象比宏观物体表现出更高的强度。为了实现此类物体提供的令人兴奋的新机会，有必要在无缺陷的纳米级系统中了解可塑性或物质变形定律。这样的法律在很大程度上是未知的，并且可能与宏观金属中的法律不同。美国和以色列首席研究人员将进行一项协作研究计划，该计划将实验和计算机建模紧密整合，以对纳米级金属和合金中可塑性的法律和机制有了更深的基本了解。这项研究将创建一个理论框架，用于设计新的纳米级材料，结合了最高的机械强度与其他服务特征。这项研究将影响机械强度是材料设计目标之一的许多科学技术领域。首席研究人员将通过跨学科会议，发布概述文章以及组织讲习班/研讨会的广泛主题，强调跨学科的纳米级现象，通过跨学科会议，发布概述文章以及组织研讨会/研讨会来传播该项目的结果。这将包括一系列的美国 - 以色列纳米力学研讨会，并进行了广泛的国际参与。为了接触更广泛的社区，将在使用在线科学新闻媒体中普及这项研究的重大努力。美国调查人员和学生将访问当地（Fairfax Co.）高中，以提供流行的演讲，包括纳米尺度现象的示例及其对现代技术的影响。技术摘要：美国和以色列首席研究人员（PIS）提出了一项协作研究计划，该计划紧密地整合了实验和计算机模型，以实现一种综合基础和核对范围的基础知识，以实现culter of culter of nucer cunter的机制。纳米级金属和合金。该研究将集中在NI和几种基于NI的合金上，从策略上选择来探测可能影响颗粒强度的一些关键因素。这些因素将包括粒径和形状，表面氧化态，合金的化学组​​成，远距离顺序和相变。这项研究将创建一个理论框架，用于设计新的纳米级材料，结合了最高的机械强度与其他服务特征。 PI将通过跨学科会议，发布概述文章以及组织研讨会/研讨会在广泛主题上强调跨学科的纳米级现象的广泛主题来传播该项目的结果。这将包括一系列的美国 - 以色列纳米力学研讨会，并进行了广泛的国际参与。为了接触更广泛的社区，将在使用在线科学新闻媒体中普及这项研究的重大努力。美国PI和学生将访问当地（Fairfax Co.）高中，以提供流行的演讲，包括纳米级现象的示例及其对现代技术的影响。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的审查标准来通过评估来获得支持的。

项目成果

Solid-solution and precipitation softening effects in defect-free faceted Nickel-Iron nanoparticles

• DOI: 10.1016/j.actamat.2022.118527
• 发表时间: 2022-11
• 期刊: Acta Materialia
• 影响因子: 9.4
• 作者: Amit Sharma;O. Mendelsohn;A. Bisht;J. Michler;Raj Kiran Koju;Y. Mishin;E. Rabkin

Size and shape effects on the strength of platinum nanoparticles

• DOI: 10.1007/s10853-021-06435-7
• 发表时间: 2021-08
• 期刊: Journal of Materials Science
• 影响因子: 4.5
• 作者: J. Zimmerman;A. Bisht;Y. Mishin;Eugen Rabkin