Generalized model for laser-induced surface structure in metallic glass

The details of the special three-dimensional micro-nano scale ripples with a period of hundreds of microns on the surfaces of a Zr-based and a La-based metallic glass irradiated separately by single laser pulse are investigated.We use the small-amplitude capillary wave theory to unveil the ripple fo...

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Bibliographic Details
Published in:Chinese physics B 2016-06, Vol.25 (6), p.557-562
Main Author: 叶林茂 武振伟 刘凯欣 汤秀章 熊向明
Format: Article
Language:English
Subjects:
Amorphous materials
Amplitudes
Mathematical models
Metallic glasses
Ripples
Viscosity
Wavelengths
Zirconium
不可压缩
广义模型
激光脉冲
激光诱导
粘性流体
表面波纹
表面结构
金属玻璃
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Summary:The details of the special three-dimensional micro-nano scale ripples with a period of hundreds of microns on the surfaces of a Zr-based and a La-based metallic glass irradiated separately by single laser pulse are investigated.We use the small-amplitude capillary wave theory to unveil the ripple formation mechanism through considering each of the molten metallic glasses as an incompressible viscous fluid.A generalized model is presented to describe the special morphology,which fits the experimental result well.It is also revealed that the viscosity brings about the biggest effect on the monotone decreasing nature of the amplitude and the wavelength of the surface ripples.The greater the viscosity is,the shorter the amplitude and the wavelength are.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/25/6/068104