Acquisition of a Field Emission Gun Analytical Transmission Electron Microscope for Materials Research

购买用于材料研究的场发射枪分析透射电子显微镜

• 批准号: 9413550
• 负责人: David Luzzi
• 金额: $ 70万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-01 至 1998-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9413550&HistoricalAwards=false
• 关键词: Acquisition; Field; Emission; Gun; Analytical

Funds fron the Academic Research Infrastructure Program will support the acquisition of a Field Emission Transmission Electron Microscope (FE-TEM), an instrument that is specifically designed for high-resolution chemical analysis. The FE-TEM will include basic specimen stages, an x-ray flourescence spectrometer, a GATAN imaging filter, and a charge- coupled-device (CCD) camera and associated hardware. The FE-TEM will be employed in the study of: 1) structure and properties of alloy and model composite interfaces; 2) the effect of impurity segregation on the fracture mechanisms of metal/ceramic interfaces; 3) structural and compositional inhomogeneities in microwave ceramics; 4) the effects of concentration gradients near grain boundaries on the properties of electronic ceramics; 5) local structure and composition in catalytic materials; 6) morphological development of nanocrystalline ceramic composites from polymeric precursors; 7) chemistry/property relations at the interphase region in polymer/ceramic composites; 8) polymer interfaces and capillary wave formation. A field emission transmission electron microscope with associated peripheral hardware will be employed in the study of materials. A diverse range of topics from composite interfaces, fracture of metal/ceramic interfaces, microwave and electronic ceramics, catalytic materials, polymer/ceramic composities, and capillary wave formation at polymer interfaces will be studied.

来自学术研究基础设施计划的资金将支持采购场发射传输电子显微镜(FE-TEM)，这是一种专门为高分辨率化学分析设计的仪器。FE-TEM将包括基本样品台、X射线荧光光谱仪、GaTan成像滤光片、电荷耦合器件(CCD)相机和相关硬件。FE-TEM将用于研究：1)合金和模型复合材料界面的结构和性能；2)杂质偏析对金属/陶瓷界面断裂机制的影响；3)微波陶瓷的结构和成分不均匀性；4)晶界附近的浓度梯度对电子陶瓷性能的影响；5)催化材料中的局部结构和组成；6)由聚合物前驱体形成的纳米陶瓷复合材料的形态发展；7)聚合物/陶瓷复合材料相界区域的化学/性能关系；8)聚合物界面和毛细管波的形成。在材料研究中将使用场发射电子显微镜和相关的外围硬件。课程内容包括复合界面、金属/陶瓷界面断裂、微波和电子陶瓷、催化材料、聚合物/陶瓷组成以及聚合物界面的毛细波形成等。