通过无形接口层增强Cu/Zr纳米层中对剪切不稳定的抗性
1College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China.
Nanomaterials (Basel, Switzerland)
|September 12, 2025
概括
具有无形界面层 (AIL) 的金属纳米层显示了增强的硬度和抑制的剪切不稳定性. 不同的AIL厚度调整了剪切带模式,为加强超纳米金属层层提供了洞察力.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 纳米技术纳米技术
背景情况:
- 金属纳米层表现出高强度,但由于剪切不稳定性而遭受低可塑性.
- 无形界面层 (AIL) 被探索为减轻这些局限性的战略.
研究的目的:
- 通过引入Cu63Zr37无形界面层 (AIL) 来研究Cu/Zr纳米板中的同时增强硬度和抑制剪切不稳定性.
- 探索AIL厚度对机械性能和剪切带行为的影响.
主要方法:
- 磁铁喷射被用于制造不同厚度的Cu/Zr纳米层 (2,5和10nm) 的AIL.
- 进行了纳米和微缩水试验,以评估硬度和剪切不稳定性.
- 进行了剪切带状模式和裂传播的分析.
主要成果:
- 带有AIL的10nmCu/Zr纳米层呈现出11.9%的硬度增加和抑制的剪切不稳定性.
- 在2纳米AIL厚度下观察到硬度异常增加,归因于增加的晶体/无形接口.
- 剪切带被用AIL抑制在纳米层中,在不同的AIL厚度下观察到明显的切割式和曲式模式.
结论:
- 引入无形界面层是一种有效的策略,可以同时提高金属纳米层的硬度和提高性.
- AIL的厚度在确定强化机制和剪切带行为方面发挥着至关重要的作用.
- 这项研究为设计具有可调整机械性能的先进超纳米金属层设计提供了一条途径.
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