相关实验视频
Updated: Jan 11, 2026

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Determining the Mechanical Strength of Ultra-Fine-Grained Metals
Published on: November 22, 2021
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不同纳米相/Al接口在Al-Cu-Li合金中的稳定性和电子结构:第一原则视角
Yan Liu1, Chuansen Deng1, Chenxu Zhao1
1School of Materials Science and Engineering, Fuzhou University, Qishan Campus, Minhou 350116, China.
Langmuir : the ACS journal of surfaces and colloids
|November 10, 2025
概括
这项研究表明,Al-Cu-Li合金是合金.
科学领域:
- 材料科学 材料科学 材料科学
- 计算材料科学科学 计算材料科学
- 物理金学 物理金学
背景情况:
- 沉增强合金的机械性能取决于沉接口.
- 了解沉物稳定性和电子结构是合金设计的关键.
研究的目的:
- 研究Al-Cu-Li合金中矩阵和纳米相 (δ'-Al3Li, θ'-Al2Cu,T1-Al6Cu4Li3) 之间的接口的稳定性和电子结构.
- 为优化沉阶段和接口设计提供理论见解.
主要方法:
- 使用第一原则计算系统地研究接口属性.
- 分析了形成,表面能量和接口能量.
主要成果:
- 在热力学上,T1阶段是最稳定的,而由于低核化屏障, δ'优先沉.
- 终端表面 (δ'(001) -AlLi和T1(001) -AlLi) 显示出高稳定性.
- Al/δ'/Al接口表现出最佳的粘合强度;Cu-Al键增强了Al/θ'/Al和Al/T1/Al接口的稳定性.
- 电子结构和粘合特性决定了接口强度和材料性能.
结论:
- 该研究阐明了电子重新排列和界面粘合在加强Al-Li合金中的关键作用.
- 理论见解指导优化沉阶段和接口,以提高机械性能.
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