Acquisition of a Scanning Electron Microscope for Materials Related Research

购买扫描电子显微镜用于材料相关研究

• 批准号: 9202441
• 负责人: Robert Krchnavek
• 金额: $ 17.5万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-07-01 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9202441&HistoricalAwards=false
• 关键词: Acquisition; Scanning; Electron; Microscope; Materials

This project will provide a Scanning Electron Microscope (SEM) which will be dedicated to support fundamental research of materials. Examples of research studies include the investigations of quasicrystals and complex intermetallic crystals, polymer processing for optical waveguides, composite materials, nanophase materials, and studies of magnetic recording media. The SEM would have a resolution of 3.5 nm at 30 Kv, an accelerating voltage range of 0.2kV to 40 Kv, and a magnification range from 10x to 300,000x. These specifications offer a large degree of flexibility for electron microscopy studies and will significantly help current research efforts as well as future projects. An integral part of the SEM would be a Wavelength Dispersive Spectrometer (WDS) and an Energy Dispersive X-ray Spoectrometer (EDS). These two subsystems give elemental analysis with submicron resolution in the lateral direction. This capability is important when studying multi- elemental systems such as intermetallics and composite materials. The high lateral resolution allows studies of composition variation within individual grains and at the grain boundaries. %%% The Materials Science and Engineering Program at Washington University in materials science and applied physics spans several departments over two schools. These inlcude the departments of mechanical, electrical, chemical and civil engineering in the School of Engineering and Applied Sciences, and physics and chemistry in the School of Arts and Sciences. Graduate research in the Materials Research Laboratory is active in the structure and properties of metals, polymers, ceramics, composites, advanced metal and polymer processing methods, polymer processing rheology, fracture mechanics of solids, and the fabrication, chemistry, physics, and mechanical behavior of composite materials.

该项目将提供扫描电子显微镜（SEM），致力于支持材料的基础研究。 研究的例子包括准晶体和复杂金属间晶体的研究、光波导的聚合物加工、复合材料、纳米相材料以及磁记录介质的研究。 SEM 在 30 Kv 下的分辨率为 3.5 nm，加速电压范围为 0.2kV 至 40 Kv，放大倍数范围为 10 倍至 300,000 倍。 这些规范为电子显微镜研究提供了很大程度的灵活性，并将极大地帮助当前的研究工作以及未来的项目。 SEM 的一个组成部分是波长色散光谱仪 (WDS) 和能量色散 X 射线光谱仪 (EDS)。 这两个子系统在横向上提供亚微米分辨率的元素分析。 在研究金属间化合物和复合材料等多元素系统时，这种能力非常重要。 高横向分辨率允许研究单个晶粒内和晶界处的成分变化。 %%% 华盛顿大学的材料科学与工程项目在材料科学和应用物理领域跨越两所学校的多个系。 其中包括工程与应用科学学院的机械、电气、化学和土木工程系，以及艺术与科学学院的物理和化学系。 材料研究实验室的研究生研究活跃于金属、聚合物、陶瓷、复合材料的结构和性能、先进金属和聚合物加工方法、聚合物加工流变学、固体断裂力学以及复合材料的制造、化学、物理和机械行为。