Acquisition of an Electron Backscatter Diffraction System

电子背散射衍射系统的采集

• 批准号: 0320871
• 负责人: Rachel Beane
• 金额: $ 14.42万
• 依托单位: Bowdoin College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0320871&HistoricalAwards=false
• 关键词: Acquisition; Electron; Backscatter; Diffraction; System

0320871BeaneThis Major Research Instrumentation (MRI) Program grant supports the acquisition of an electron backscattered diffraction system (EBSD), provides limited PI salary support and travel costs associated with instrument training, and supports the acquisition of related consumables, sample preparation equipment and software. The EBSD will be installed on an existing modern scanning electron microscope (SEM) equipped with an energy-dispersive spectrometer (EDS) in the Department of Geology at Bowdoin College. Analysis of the diffraction pattern of backscattered electrons from crystalline materials allows identification of phase and its crystal lattice orientation. The scanning and mapping capabilities of the system permit rapid acquisition of data from polished rock thin sections at sub-micron resolutions. Among other uses, these data may be applied to evaluate crystallographic preferred orientations (CPO) of mineral fabrics, and to examine misorientation axes and angles that may signify processes such as subgrain development and dislocation creep. EBSD is a relatively new analytical capability that allows geologists to test existing nucleation, growth, and deformation models for minerals and rocks, and to develop new ones. The EBSD facility will support faculty and students research at Bowdoin and regional colleges and universities including Middlebury College and the University of Maine***

0320871这项重大研究仪器(MRI)计划拨款支持购买电子背散射衍射系统(EBSD)，提供有限的PI工资支持和与仪器培训相关的差旅费，并支持购买相关消耗品、样品制备设备和软件。EBSD将安装在鲍登学院地质学系现有的配备有能量色散光谱仪(EDS)的现代扫描电子显微镜(SEM)上。通过分析晶体材料的背向散射电子的衍射图，可以确定晶相及其晶格取向。该系统的扫描和测绘能力允许以亚微米分辨率从抛光的岩石薄片中快速获取数据。在其他用途中，这些数据可用于评估矿物组构的晶体择优取向(CPO)，并检查可能表示亚晶发育和位错蠕变等过程的取向错误轴和角度。EBSD是一种相对较新的分析能力，允许地质学家测试现有的矿物和岩石的成核、生长和变形模型，并开发新的模型。EBSD设施将支持鲍登学院以及包括米德尔伯里学院和缅因州大学在内的地区学院和大学的教职员工和学生的研究*