Probing the nanomechanics of single grain boundary with decorated solutes

用修饰溶质探测单晶界的纳米力学

• 批准号: DE200101105
• 负责人: Dr Linlin Li
• 金额: --
• 依托单位: The University of Sydney
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Early Career Researcher Award
• 财政年份: 2022
• 资助国家: 澳大利亚
• 起止时间: 2022-02-28 至 2022-06-29
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DE200101105
• 关键词: Probing; nanomechanics; single; grain; boundary

Grain boundaries (GBs) are thermodynamically susceptible to attract solutes to reduce system energy. Elaborately manipulating the GB nanostructure and chemistry via segregation can essentially be conducive, rather than detrimental, to materials performance. However, the underlying mechanism of GB segregation and its detailed effect on material properties remain elusive due to the GB complexities in the polycrystals. Through correlative in-situ nanomechanical testing and atom probe tomography, this project aims to unravel the rationale of segregation behaviour of individual GBs and its effectiveness to enhance the material performance, and hence enable nanostructural design of advanced metallic materials with unprecedented properties.

晶界（GB）在热力学上易于吸引溶质以降低系统能量。通过偏析精心操纵GB纳米结构和化学性质基本上可以有益于材料性能，而不是有害于材料性能。然而，由于GB在多晶体中的复杂性，GB偏析的潜在机制及其对材料性能的详细影响仍然难以捉摸。通过相关的原位纳米力学测试和原子探针断层扫描，该项目旨在揭示单个GB的偏析行为的基本原理及其对提高材料性能的有效性，从而实现具有前所未有性能的先进金属材料的纳米结构设计。