Mechanical and Functional Design of Nanostructured Materials

纳米结构材料的机械和功能设计

• 批准号: CRC-2021-00512
• 负责人: ZHU, GUOZHEN
• 金额: $ 3.64万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Canada Research Chairs
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=760096
• 关键词: Mechanical; Functional; Design; Nanostructured; Materials

The Chair program focuses on understanding and designing atomic and electronic structures of embedded nano-structures, which are confined at dislocations and interfaces in crystalline solids, in order to enhance material performance beyond that of the idealized solid. In the proposed research program, Dr. Zhu plans to study formation dynamics and performance characteristics of embedded nano-structures by advancing in-situ electron microscopy techniques and further exploring her recent findings on reconstructed gold-oxide interfaces and dislocation-based nano-structures in magnesium. Research will be untaken in three themes. Theme1 will expand beyond the visualization capability of Dr. Zhu's current in-situ, electron microscope-based thermo-mechanical testing platform by adding new function such as monitoring crystallographic evolutions and estimating mechanical properties in a way that is comparable to macroscopic testing. Dr. Zhu will make use of the technique developed in Theme1 to overcome the characterization difficulties of embedded nano-structures and study linear (Theme2) and planar (Theme3) embedded nano-structures during formation, migration, and deformation processes. Theme2 will identify formation dynamics and deformation physics of dislocation-based nano-structures to develop advanced magnesium alloys. Theme3 will tune gold-rutile interfaces and interface-mediated mass migration processes to assemble high quality rutile nanowires. The outputs of the proposed research include: i). new characterization techniques that can resolve embedded nano-structures and their surrounding lattices; ii) the development of high-strength and high-ductile magnesium alloys and advanced oxide nanowires for biomolecule detection; iii) a theoretical framework that is capable of predicting defect-enhanced nano-structures and the corresponding material behaviors that they can produce. The results will be of great value to the key industries involved in aerospace, automotive, renewable energy industry. Students and researchers will be trained with the unique skillset, particularly reconfiguring electron microscopes and characterizing new nano-structures, for their further academic and career development.

该主席计划的重点是理解和设计嵌入纳米结构的原子和电子结构，这些结构被限制在晶体固体的位错和界面处，以提高材料性能，使其超越理想化固体。在拟议的研究项目中，朱博士计划通过先进的原位电子显微镜技术来研究嵌入式纳米结构的形成动力学和性能特征，并进一步探索她最近在重建金氧化物界面和镁中基于位错的纳米结构方面的发现。研究将分三个主题进行。 Theme1将超越朱博士目前基于电子显微镜的原位热机械测试平台的可视化能力，添加新功能，例如监测晶体演化和以与宏观测试相当的方式估计机械性能。朱博士将利用主题1中开发的技术来克服嵌入纳米结构的表征困难，并研究线性（主题2）和平面（主题3）嵌入纳米结构在形成、迁移和变形过程中的特征。主题2将确定基于位错的纳米结构的形成动力学和变形物理学，以开发先进的镁合金。 Theme3 将调整金-金红石界面和界面介导的质量迁移过程，以组装高质量的金红石纳米线。拟议研究的成果包括： i).新的表征技术可以解析嵌入的纳米结构及其周围的晶格； ii) 开发用于生物分子检测的高强度、高延展性镁合金和先进氧化物纳米线； iii）能够预测缺陷增强纳米结构及其产生的相应材料行为的理论框架。研究结果将对航空航天、汽车、可再生能源行业等重点行业具有重要价值。学生和研究人员将接受独特技能的培训，特别是重新配置电子显微镜和表征新纳米结构，以促进他们进一步的学术和职业发展。