MRI: Acquisition of Analytical Scanning Electron Microscope for Engineering and Earth Science Research

这项重大研究仪器 (MRI) 拨款提供资金用于购买最先进的场发射扫描电子显微镜 (SEM)，其扩展功能包括电子背散射衍射 (EBSD) 检测器、具有 500oC 能力的原位加载台、背散射检测器、3D 图像重建软件和彩色阴极发光 (CCL) 检测器。 EBSD 系统和加载阶段将用于回答制造中的重要问题，例如零件与晶粒尺寸比对微观和纳米成形中晶粒结构演变和成形质量的影响，以及孪生和基于位错的变形在轻质结构六方密排合金成形中的重要性。这些信息将用于构建微尺度成型的微观结构模型。 EBSD 系统还将用于绘制在一系列热液条件下变形的橄榄石晶体的方向，用于地球科学研究适应断层带滑移的变形机制。 UNH 和地区大学的地球科学家将使用支持 CCL 的 SEM 进行最先进的研究，结合明确的晶体生长区域和地质年代学或微量元素分析，以研究地球岩石圈的形成、地球岩石圈内的流体（包括碳）循环、板块边界过程和相关主题。 它还将用于表征大气传输研究中的火山灰。通过该仪器获得的信息将用于改进宏观、微观和纳米尺度上基于变形的制造工艺。 它还将提高人们对地幔形成、火山灰形成和运输以及仿生材料变形的了解。 SEM将为本科生研究提供新的机会。 该仪器的远程访问功能还将用于大大增强新罕布什尔大学的 K-12 外展能力，并为地区工业提供资源。

This Major Research Instrumentation (MRI) grant provides funding to purchase a state-of-the-art field emission scanning electron microscope (SEM) with extended capabilities including an electron backscatter diffraction (EBSD) detector, an in-situ loading stage with 500oC capability, a backscatter detector, 3D image reconstruction software, and a color cathodoluminescence (CCL) detector. The EBSD system and loading stage will be used to answer important questions in manufacturing regarding the impact of part-to-grain size ratio on evolution of grain structure and forming quality in micro and nanoforming, and the importance of twinning and dislocation-based deformation in forming of hexagonal close-packed alloys for lightweight structures. The information will be used to construct microstructurally-informed modeling of microscale forming. The EBSD system will also be used to map the orientation of the olivine crystals deformed under a range of hydrothermal conditions for Earth Science research studies of the deformation mechanisms that accommodate slip in fault zones. The CCL-enabled SEM will be used by Earth Scientists from UNH and area universities to conduct state-of-the-art investigations combining well-defined crystal growth zones and geochronology or trace elemental analyses to investigate the formation of Earth's lithosphere, fluid (including carbon) cycling within Earth's lithosphere, plate boundary processes, and related topics. It will also be used to characterize volcanic ash for atmospheric transport studiesThe information obtained with this instrument will be used to improve deformation-based manufacturing processes on the macro, micro, and nanoscale. It will also lead to improved understanding of the formation of the earth's mantle, formation and transport of volcanic ash, and deformation of bio-inspired materials. The SEM will provide new opportunities for undergraduate research. The instrument's remote access capabilities will also be used to greatly enhance the University of New Hampshire's K-12 outreach capabilities and to provide a resource for regional industry.