MRI: Acquisition of a High Resolution Electron Probe Micro-Analyzer

MRI：获取高分辨率电子探针显微分析仪

• 批准号: 1429265
• 负责人: Michele Manuel
• 金额: $ 90.45万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1429265&HistoricalAwards=false
• 关键词: MRI; Acquisition; Resolution; Electron; Probe

Non-Technical: This research contract centers on the acquisition of a new high-resolution electron probe microanalysis system with an integrated electron backscatter diffraction detector. This instrument will be the only one in the US and only one of three in the world with the capability of performing simultaneous crystallographic and chemical mapping at the sub-micron scale, and will permit trace elemental analysis with superb accuracy in a user-friendly environment. The instrument will have regional and international accessibility making it a multi-use, multi-institutional piece of state-of the-art equipment. This research program brings together a unique set of 15 researchers from 7 Florida state universities (University of Florida, University of North Florida, Florida State University, Florida A&M University, University of Central Florida, Florida International University and University of South Florida) that have one commonality: the need to understand the connection between chemistry and structure at the sub-micron scale. The central theme of this instrumentation program with regards to teaching, education and outreach is lowering institutional barriers. A multi-pronged approach has been developed to execute this objective: 1) a remote access system, 2) K-12 education modules developed for teachers to help them integrate microscopy into their classroom curricula, 3) partnerships with the on-campus NSF REU program to expose talented undergraduates to advanced microscopy techniques, where selection will be based on talent and focused on increasing diversity of women and underrepresented groups, 4) continuing education programs, and 5) strategic partnerships with 2 minority serving institutions and 5 emerging Hispanic serving institutions provide fertile ground and access to underrepresented groups to increase the impact of the proposed education and outreach initiatives. Technical: This electron probe microanalysis system produces a small spot size with high spatial resolution on the nanometer scale. The uniqueness of the instrument can be highlighted in its use in transforming research in 4 critical areas. These areas include: 1) revealing the fundamental connections between microstructure, chemistry and microtexture in light element structural alloys, 2) understanding chemical diffusion in metallic and oxide systems to develop a unified theory for thermal diffusion while gaining deeper insight into the relationship between chemistry and structure in functional oxides, and 3) mapping phase boundaries in nanoprecipitation dispersion strengthened systems, and 4) robust and accurate measurement of minor and trace element with high spectral resolution needed for geological materials. The key features of this instrument that create maximal impact are the ability to perform: 1) trace elemental analysis with superb accuracy in a user-friendly environment, 2) quantitative mapping of light elements to show their true concentration distribution and advanced spectral resolution to avoid peak overlaps that are common with light elements, 3) fine-scale microstructural, chemical and crystallographic analysis, and 4) research and teaching by logging in online to remotely view and control the instrument.

非技术：这项研究合同的中心是购买一种新的高分辨率电子探针显微分析系统，该系统具有集成的电子背散射衍射检测器。 这台仪器将是美国唯一一台，也是世界上仅有的三台仪器之一，能够在亚微米尺度上同时进行晶体学和化学绘图，并将在用户友好的环境中以极高的精度进行痕量元素分析。该仪器将可在区域和国际上使用，使其成为多用途、多机构的最先进设备。 这项研究计划汇集了来自7所佛罗里达州立大学（佛罗里达大学，北佛罗里达大学，佛罗里达州立大学，佛罗里达A M大学，中央佛罗里达大学，佛罗里达国际大学和南佛罗里达大学）的15名研究人员，他们有一个共同点：需要了解亚微米尺度下化学与结构之间的联系。这一仪器方案在教学、教育和推广方面的中心主题是降低体制障碍。为实现这一目标，制定了多管齐下的办法：1）远程访问系统，2）为教师开发的K-12教育模块，帮助他们将显微镜融入课堂课程，3）与校园NSF REU计划合作，使有才华的本科生接触先进的显微镜技术，选拔将基于人才，并侧重于增加妇女和代表性不足的群体的多样性，4）继续教育计划，和5）与2个少数民族服务机构和5个新兴的西班牙裔服务机构的战略伙伴关系提供肥沃的土壤和获得代表性不足的群体，以增加拟议的教育和推广活动的影响。技术：这种电子探针微量分析系统产生一个小的斑点尺寸与高空间分辨率的纳米尺度。该工具的独特性可以突出体现在它在4个关键领域的转化研究中的使用。 这些领域包括：1）揭示轻元素结构合金中微观结构、化学和微观织构之间的基本联系，2）理解金属和氧化物体系中的化学扩散，以发展热扩散的统一理论，同时更深入地了解功能氧化物中化学和结构之间的关系，以及3）绘制纳米沉淀弥散强化体系中的相边界，（4）对地质材料所需的高光谱分辨率的微量和痕量元素进行稳健和准确的测量。该工具产生最大影响的关键特征是能够执行：1）在用户友好的环境中具有极高精度的痕量元素分析，2）轻元素的定量绘图，以显示其真实浓度分布和先进的光谱分辨率，以避免轻元素常见的峰重叠，3）精细尺度的微观结构、化学和晶体学分析，4）通过在线登录远程查看和控制仪器进行科研教学。