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.

椅子计划的重点是理解和设计嵌入式纳米结构的原子和电子结构，这些结构限制在晶体固体中的位错和接口上，以增强材料性能超出理想化固体的性能。在拟议的研究计划中，Zhu博士计划通过推进现场电子显微镜技术，并进一步探索她最近在镁的重建金氧化物界面和基于脱位的纳米结构的发现，来研究嵌入式纳米结构的形成动态和性能特征。研究将在三个主题中没有得到解决。 Theme1将通过添加新功能（例如监视晶体学演化和估算机械性能的方式，以与宏观测试相当的方式估算机械性能，them1将扩展超出朱博士的当前现场，基于电子显微镜的热机械测试平台的可视化能力。朱博士将利用主题1中开发的技术来克服嵌入式纳米结构的特征困难，并研究线性（主题2）和平面（主题3）在形成，迁移和变形过程中嵌入的纳米结构。主题2将确定基于脱位的纳米结构的形成动力学和变形物理，以开发高级镁合金。 them3将调整金色 - 鲁丁界面和接口介导的质量迁移过程，以组装高质量的金红石纳米线。拟议研究的产出包括：i）。可以解决嵌入式纳米结构及其周围晶格的新特征技术； ii）开发高强度和高脱糊性镁合金和晚期氧化物纳米线以进行生物分子检测； iii）一个理论框架，能够预测缺陷增强的纳米结构以及它们可以产生的相应材料行为。结果对于航空航天，汽车，可再生能源行业的关键产业将具有很大的价值。学生和研究人员将接受独特的技能培训，尤其是重新配置电子显微镜，并为新的纳米结构来表征其进一步的学术和职业发展。