金属极限晶粒下的界面特征 2024 年度课题年度工作报告

该课题 2024 年围绕极限晶粒金属界面特征展开研究，完成 10nm 以下极限纳米结构制备及普适性验证。通过多种塑性变形技术，在纯 Pt、Co 等单质及 Ni-Cr、Ti-12Mo 等合金中取得突破，发现 Schwarz、Kelvin 晶体等新型结构，揭示晶界弛豫、孪晶等稳定机制，部分材料硬度超 10GPa 且热稳定性优异。发表 SCI 论文 9 篇，申请专利 3 项，经费执行合规，人员队伍稳定，为极限晶粒金属应用奠定基础。

In 2024, this research project focused on the interfacial characteristics of ultrafine-grained metals, and completed the fabrication of sub-10 nm nanostructures and their universality verification. Leveraging multiple plastic deformation techniques, breakthroughs were achieved in pure elemental metals including Pt and Co, as well as alloys such as Ni-Cr and Ti-12Mo. Novel structures like Schwarz crystals and Kelvin crystals were discovered, and the stabilization mechanisms including grain boundary relaxation and twinning were revealed. Some of the as-prepared materials exhibit a hardness exceeding 10 GPa and excellent thermal stability. A total of 9 SCI-indexed papers were published, and 3 patent applications were filed. The project's fund implementation complied with relevant regulations, and the research team remained stable. This work laid a solid foundation for the application of ultrafine-grained metals.