MRI: Acquisition of In Situ TEM Probing Capability to Elucidate the Stability of Nanostructured Materials

MRI：获得原位 TEM 探测能力以阐明纳米结构材料的稳定性

• 批准号: 1531722
• 负责人: Gregory Thompson
• 金额: $ 22.51万
• 依托单位: University of Alabama Tuscaloosa
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-15 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1531722&HistoricalAwards=false
• 关键词: MRI; Acquisition; Situ; TEM; Probing

Transmission electron microscopy (TEM) is a means to characterize materials from which connections between structure and properties are understood. Such links allow scientists the understanding needed to engineer new materials with superior performances. In this award, a microscopy platform for real-time mechanical measurements in the TEM will be enabled. This platform will enable researchers to watch how materials, such as glasses, metals, and ceramics bend and break. From these observations, researchers gain new insights and understanding in how materials can be engineering to withstand greater mechanical load before failure. The instrument platform will be integrated into the University of Alabama's (UA) TEM, which is located in a general user facility. Over the past decade, UA's TEM has enabled over 250 users (both UA and off-site) in their research. This has provided high-tech training needed for the next-generation national science workforce. The new instrumentation will continue to ensure the continuation of educational and workforce development through course work and related workshops and conferences that will be held on the campus of UA.This award enables new capabilities to the University of Alabama's (UA) transmission electron microscopy (TEM) research activities. Specifically, the platform will allow researchers to measure and quantify in situ, real time deformation mechanisms to various loading behavior at the nanometric length scale. This platform will substantially impact the active and emerging research programs in deformation including those in glassy-crystalline composites, nanocrystalline metallic grains, and those in carbide and nitride ceramics. This toolset will be the linchpin technology that bridges synthesis-properties-simulations by characterization of how nanostructure regulates the hierarchy of deformation mechanisms. The in situ probe will be coupled to an existing precession electron diffraction imaging technique where the grain character under the in situ loading will be directly correlated. Without this dynamical probing capability, material responses are inferred leaving critical gaps in connecting experimental feedback to computational materials science predictions and understanding. In the past decade, UA's TEM has been a centerpiece microscope in its user facility (www.caf.ua.edu), being the most used tool in the center that has enabled over 250 users on and off the campus in their research activities. These users have graduated and are engaged in careers that build our next-generation national workforce.

透射电子显微镜 (TEM) 是一种表征材料的方法，可以从中了解结构和性能之间的联系。这种联系使科学家能够了解设计具有卓越性能的新材料所需的知识。 在该奖项中，将启用用于 TEM 中实时机械测量的显微镜平台。 该平台将使研究人员能够观察玻璃、金属和陶瓷等材料如何弯曲和断裂。从这些观察中，研究人员获得了新的见解和理解，了解如何设计材料以在失效前承受更大的机械载荷。该仪器平台将集成到阿拉巴马大学 (UA) 的 TEM，该 TEM 位于一般用户设施中。 在过去的十年中，UA 的 TEM 已支持超过 250 个用户（UA 和场外）进行研究。这为下一代国家科学劳动力提供了所需的高科技培训。新仪器将通过在阿拉巴马大学校园内举办的课程工作以及相关研讨会和会议，继续确保教育和劳动力发展的持续。该奖项为阿拉巴马大学 (UA) 的透射电子显微镜 (TEM) 提供了新的功能）研究活动。具体来说，该平台将允许研究人员测量和量化纳米长度尺度上各种负载行为的原位实时变形机制。该平台将极大地影响变形方面活跃的和新兴的研究项目，包括玻璃晶复合材料、纳米晶金属颗粒以及碳化物和氮化物陶瓷的研究项目。该工具集将成为关键技术，通过表征纳米结构如何调节变形机制的层次结构来连接合成-性能-模拟。原位探针将与现有的进动电子衍射成像技术相结合，其中原位载荷下的颗粒特征将直接相关。如果没有这种动态探测能力，就会推断材料响应，从而在将实验反馈与计算材料科学预测和理解联系起来方面留下关键差距。在过去的十年中，UA 的 TEM 一直是其用户设施 (www.caf.ua.edu) 中的核心显微镜，是该中心最常用的工具，使校园内外超过 250 名用户能够进行研究活动。这些用户已经毕业并从事构建我们下一代国家劳动力的职业。