Examination of nuclear materials with two-dimensional nanostructures

二维纳米结构核材料的检查

• 批准号: 2267138
• 金额: --
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2267138
• 关键词: Examination; nuclear; materials; two; dimensional

In this project, the student will use diffraction-based methods to study the 2D nanostructures in numerous types of materials and investigate the underlying mechanisms responsible for their deformation in realistic industrial applications. A starting point of the study will be the characterisation of reference samples of virgin graphite for use in the muon target and Gen-IV reactors and novel MAX phases for nuclear fission and fusion applications. Combining the results from neutron diffraction, transmission electron microscope and Raman spectroscopy, the aim is to understand the diffraction patterns in these materials better and establish an algorithm to best analyse them. Based on this, the findings will be applied to industrial graphite and MAX phases to study the material changes after they have been exposed to high temperature, neutron and/or proton irradiation to gain insight into the fundamental aspects of the defects in these materials and how they accommodate strains when they are deformed as in industrial applications. Another exciting aspect of this project is to synthesise novel MAX phases in particular for neutronic applications. Neutron radiography on beamline IMAT (ISIS, RAL) will be the main approach and Bragg edge radiography will provide real time information on the spatial distribution of phases produced during the process, with neutron resonances further used to noninvasively monitor the temperature distributions.

在这个项目中，学生将使用基于衍射的方法来研究多种类型材料中的2D纳米结构，并研究在实际工业应用中导致其变形的潜在机制。该研究的起点将是用于μ子靶和第四代反应堆以及用于核裂变和聚变应用的新型MAX相的原始石墨参考样品的表征。结合中子衍射、透射电子显微镜和拉曼光谱的结果，目的是更好地理解这些材料中的衍射图案，并建立一种算法来最好地分析它们。在此基础上，研究结果将应用于工业石墨和MAX相，以研究它们暴露于高温，中子和/或质子辐照后的材料变化，以深入了解这些材料中缺陷的基本方面，以及它们在工业应用中变形时如何适应应变。这个项目的另一个令人兴奋的方面是合成新的MAX阶段，特别是中子应用。束线IMAT（ISIS，RAL）上的中子射线照相术将是主要的方法，布拉格边缘射线照相术将提供关于在该过程中产生的相的空间分布的真实的时间信息，中子共振进一步用于非侵入性地监测温度分布。