MRI: Acquisition of an electron probe microanalyzer for Earth Science and Materials research and education

MRI：购买电子探针显微分析仪用于地球科学和材料研究和教育

• 批准号: 1428877
• 负责人: Matthew Kohn
• 金额: $ 91.45万
• 依托单位: Boise State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1428877&HistoricalAwards=false
• 关键词: MRI; Acquisition; electron; probe; microanalyzer

This award will provide funds to acquire a state-of-the-art electron probe microanalyzer (EPMA) to support numerous funded and ongoing research projects. As a cornerstone instrument within the Center for Materials Characterization, the EPMA is vital to the scientific health of the university and region by providing a versatile platform for the analysis of major, minor, and trace elements to promote NSF-funded research in the solid Earth Sciences and in Materials Science and Engineering. The EPMA will directly enhance undergraduate and graduate student research, teaching, and hands-on experiences through directed research and classroom projects. Adding this instrument will fill a critical need in the regional analytical infrastructure, promote cross-disciplinary research, and greatly enhance the quality and scope of Earth Science and Materials research and education in the Interior Northwest. Major research objectives for the EPMA include the following: 1. Analysis of major, minor, and trace element compositions and zoning in metamorphic minerals to infer petrogenetic processes and pressure-temperature conditions and evolution; 2. Major, minor, and trace element analysis of igneous minerals to constrain (a) melt evolution at mid-ocean ridges, (b) formation of the mantle lithosphere, and (c) felsic magmagenesis and formation of continental crust (in conjunction with U-Pb geochronology); 3. Major and minor element analysis of functional ceramics, e.g. barium polytitanates and lanthanide perovskites, to evaluate how vacancy-producing chemical substitutions affect physical and electrical properties; 4. Composition maps of tooth enamel to understand mineralization processes of modern teeth (which has implications for interpreting chemical and isotopic data) and trace element uptake; 5. Trace element analysis of minerals for geologic thermometry as applied to understanding the conditions of formation of mylonites and dateable minerals like zircon and titanite; 6. Major and minor element analysis of magnetic shape memory alloys, e.g. Ni-Mn-Ga, to determine micrometer-scale element distributions and their influence on mechanical and magnetic properties; 7. Minor element contamination of materials of interest to the nuclear industry, especially graphite- molten salt interactions; and 8. Major and minor element stoichiometry of transition-metal dichalcogenides for electronics materials research and development.

这项奖励将提供资金，以购买最先进的电子探针显微分析仪(EPMA)，以支持众多已资助和正在进行的研究项目。作为材料表征中心内的基石工具，EPMA为主要、次要和微量元素的分析提供了一个通用平台，对大学和地区的科学健康至关重要，以促进NSF资助的固体地球科学和材料科学与工程方面的研究。EPMA将通过指导性研究和课堂项目直接加强本科生和研究生的研究、教学和实践经验。增加这台仪器将满足地区分析基础设施的迫切需求，促进跨学科研究，并极大地提高西北内陆地区地球科学和材料研究和教育的质量和范围。EPMA的主要研究目标包括：1.分析变质矿物中的主、次、微量元素组成和分带，以推断岩石成因过程和压力-温度条件和演化；2.对火成岩矿物进行主、次和微量元素分析，以约束(A)大洋中脊的熔体演化，(B)地幔岩石圈的形成，以及(C)长英质岩浆作用和大陆地壳的形成(结合U-Pb年代学)；3.功能陶瓷的主次元素分析，如多钛酸钡和稀土钙钛矿，以评估产生空位的化学替代作用对物理和电性的影响；4.牙釉质成分图，以了解现代牙齿的矿化过程(这对解释化学和同位素数据有意义)和微量元素摄取；5.用于地质测温的矿物的微量元素分析，用于了解糜棱岩和锆石、钛矿等可测年矿物的形成条件；6.磁性形状记忆合金，如Ni-Mn-Ga的主元素和次元素分析，以确定微米级元素分布及其对机械和磁性的影响；7.核工业感兴趣的材料的微量元素污染，特别是石墨-熔盐相互作用；8.电子材料研发用过渡金属二卤化物的主次元素化学计量比。