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Updated: Jul 20, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

在金属玻璃中进行尺寸依赖的玻璃化.

Valerio Di Lisio¹, Isabella Gallino², Sascha Sebastian Riegler³

¹Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018, San Sebastián, Spain.

Nature communications

|August 4, 2023

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金属玻璃表现出尺寸依赖的玻璃化动力学,较小的样本显示较低的虚拟温度. 这一发现为金属玻璃中实现较低能量的新方法提供了新的途径.

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

背景情况:

散装金属玻璃 (BMG) 具有独特的特性.
减少样本大小可以显著改变材料特性.
了解尺寸效应对于BMG应用至关重要.

研究的目的:

研究缩小尺寸对Au和Pt金属玻璃的玻璃化行为和原子移动性的影响.
探索样本大小和玻璃动态之间的关系.

主要方法:

系统地减少Au和Pt金属玻璃的长度尺度.
使用快速扫描热量计 (FSC) 来研究在广泛的冷却速率和频率的玻璃动态.

主要成果:

初级α放松过程与样本大小无关,其行为与散装材料类似.
在微米尺寸的眼镜中观察到明显的,取决于尺寸的玻璃化动力学.
最小的样本与散装相比,虚拟温度 (Tf) 降低了40K以上,特别是在低冷却速度下.

结论:

样本大小显著影响金属玻璃的玻璃化动力学,特别是在较小的尺度和较低的冷却速度下.
这些发现表明,通过控制样本大小,可以在金属玻璃中实现更低的能量状态.

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Last Updated: Jul 20, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Measuring the Densities of Aqueous Glasses at Cryogenic Temperatures

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Published on: June 28, 2017

Production of Synthetic Nuclear Melt Glass

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Published on: January 4, 2016

观察到的尺寸效应对金属玻璃的设计和应用有深远的影响.