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Molecular Crystals and Liquid Crystals Volume 723, 2021 - Issue 1
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Low-Dimensional Solids and Molecular Crystals

Melting characteristics and dynamic evolution of microstructure of single-crystal gold film irradiated by laser under the non-Fourier effect

Qing Wanga School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China;b Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai, ChinaView further author information
,
Ling Lia School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China;b Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai, ChinaCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0002-4844-9996View further author information
ORCID Icon &
Mo Yanga School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, China;b Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai, ChinaView further author information
Pages 62-80 | Published online: 28 Jun 2021
 
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Abstract

The process of ultra-thin single crystal gold film irradiated by femtosecond laser is simulated by the combination of improved two-temperature model (TTM) and molecular dynamics (MD). The results indicate that under the non-Fourier effect, the gold film shows special melting characteristics and spalling mechanism. The phenomena of homogeneous melting and pore spalling of gold film are successfully distinguished by curing rate method and atomic density method respectively. Due to the tiny thickness of the gold film studied, the damage mechanism of the gold film irradiated by laser has also changed.

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Funding

The authors gratefully acknowledge the financial support from National Natural Science Foundation of China under Grant No. 51476102 and No. 51736007.

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