打破单原子金属的玻璃化限制
Xing Tong1, Yue-E Zhang1,2, Bao-Shuang Shang1
1Songshan Lake Materials Laboratory, Dongguan, China.
Nature materials
|July 30, 2024
概括
研究人员已经成功地使用皮秒脉冲激光切除来玻璃化黄金和其他难以玻璃化的金属. 这一突破表明,玻璃化是物质的内在性质,扩大了金属玻璃设计的可能性.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 所有材料形成玻璃的能力,这是特恩布尔提出的概念,仍然是一个开放的问题.
- 单原子金属,特别是像面中心立方体 (FCC) 金属这样密集的结构,已被证明很难玻璃化.
- 玻璃化或玻璃形成对于开发具有独特性质的先进金属玻璃至关重要.
研究的目的:
- 调查臭名昭着的难以玻璃化的单原子金属的玻璃化,包括黄金和FCC金属.
- 探索一种新的方法来实现对抗玻璃形成的材料的玻璃化.
- 了解控制金属玻璃稳定性的原子尺度机制.
主要方法:
- 在液体介质中利用皮秒脉冲激光切除,快速冷却和玻璃化金属.
- 使用液体环境的快速冷却动力学和核化抑制来促进玻璃的形成.
- 进行模拟来分析原子配置和金属玻璃中的岩石像集群的稳定性.
主要成果:
- 成功实现了黄金和其他几种FCC和六角金属的玻璃化,克服了以前的限制.
- 证明了快速冷却和核化抑制是玻璃化过程中的关键因素.
- 模拟显示,像伊科萨赫德拉类集群的拓挫折有助于单原子金属玻璃的稳定性.
结论:
- 玻璃化是物质的内在性质,即使在以前被认为不是玻璃成型的材料中也可以实现.
- 图秒脉冲激光切除方法为准备和设计金属玻璃提供了一种新的策略.
- 了解原子配置,特别是集群稳定性,对于定制金属玻璃性能至关重要.
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