A state-of-the-art strain measurement system in electron microscope

最先进的电子显微镜应变测量系统

• 批准号: RTI-2016-00518
• 负责人: Yao, Zhongwen
• 金额: $ 6.63万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=591477
• 关键词: state; art; strain; measurement; system

Understanding and controlling ‘strain’ in materials is fundamental for materials scientists working on the performance of materials. The strain and/or lattice distortion caused by local changes in chemistry or stress, can have significant effect on mechanical, electrical and magnetic properties in a wide range of materials. Therefore, determination of strain in a processed, failed, or natural sample will have ramifications in almost all fields of materials science and solid-state physics. It is anticipated that the proposed tools will provide us a strong capability to measure the local strain state of materials at the nano scale, and the requested system will be highly used for many ongoing research works at Queen’s and the area around. It will enable us to generate results and data that are directly applicable to a wide range of industry including power generation and transport in Canada. It will train HQP directly in techniques and relevant research areas which are of current and ongoing interest to industry. Currently, the only method proven capable of measuring strains at spatial resolutions of 1nm is transmission electron microscopy (TEM). This is a critical lengthscale – it is the lengthscale that controls dislocations, the fundamental mechanism of plasticity.

理解和控制材料中的“应变”是材料科学家研究材料性能的基础。 由化学或应力的局部变化引起的应变和/或晶格畸变可以对广泛范围的材料中的机械、电和磁性能产生显著影响。 因此，在处理过的，失败的，或天然样品中的应变测定将在材料科学和固态物理的几乎所有领域产生影响。预计所提出的工具将为我们提供一个强大的能力来测量材料的局部应变状态在纳米尺度上，所要求的系统将高度用于许多正在进行的研究工作在皇后和周围地区。它将使我们能够生成直接适用于加拿大发电和运输等广泛行业的结果和数据。它将直接在技术和相关研究领域对HQP进行培训，这些技术和研究领域是当前和正在进行的行业兴趣。目前，唯一被证明能够以1 nm的空间分辨率测量应变的方法是透射电子显微镜（TEM）。 这是一个临界的长度尺度--它控制着位错的长度尺度，位错是塑性的基本机制。